# 16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS16)

18-22 September 2017
Shanghai Jiao Tong University
Asia/Shanghai timezone
Deadline Approaching: Submission of manuscript for CGS16 Proceedings
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## Contribution List

Displaying 127 contributions out of 127
Type: Oral Presentation
Atomic nuclei are driven towards non-spherical equilibrium shapes when moving away from shell closures. The energy levels in well-deformed nuclei are characterized by collective motion, including rotations and vibrations, and by intrinsic excitations. In the rare-earth nuclei around double midshell (Z=66, N=104), not only quadrupole vibrational modes such as $\gamma$ and $\beta$ vibrations, but al ... More
Presented by Guangxin ZHANG
Type: Oral Presentation
Americium-242m is a unique nuclide with attributes that make it suitable for numerous energy-related applications. With a 141-year half life, the metastable isomer is long-lived with respect to the americium-242 ground state (16 hours). Another appealing quality is that americium-242m has the highest measured thermal-fission cross section of any known nucleus. The americium-242m neutron-induced ... More
Presented by Matthew BUCKNER
Type: Invited talk
Astrophysical models, like those used for stellar objects, require accurate thermonuclear reaction rates in order to predict the nuclear power production and dynamic evolution of these systems. Direct measurement of nuclear reaction rates in thermonuclear plasmas is challenging because these conditions are difficult to produce and diagnose. There are physics issues such as plasma electron-screenin ... More
Presented by D. CASEY
Type: Oral Presentation
The Isochronous Mass Spectrometry (IMS) is a powerful technique developed in heavy-ion storage rings for measuring masses of very short-lived exotic nuclei. The IMS is based on the isochronous setting of the ring. One of the main parameters of this setting is the transition energy gt. It has been a challenge to determine the gt and especially to monitor the variation of gt during experiments. ... More
Presented by Dr. Ruijiu CHEN
Type: Invited talk
An important approach to nuclear structure is the use of structural symmetries and approximate symmetries. An example of the former is SU(3), pioneered by Elliott in the 1950's. This breaks down in heavy nuclei where the well-known approximate symmetry, pseudo-SU(3), has been actively studied for several decades. As an outgrowth of studies of proton-neutron interactions, we have proposed a new ap ... More
Presented by Prof. Richard F CASTEN
Type: Oral Presentation
We present a microscopic calculation of alpha-cluster formation in heavy nuclei by using the quartetting wave function approach[1]. The interaction of the quartet with the core nucleus is taken in local density approximation. The alpha-cluster formation is found to be particularly sensitive to the interplay of the mean field felt by the alpha-cluster and the Pauli blocking as a consequence of anti ... More
Presented by Prof. Xu CHANG
Type: Oral Presentation
Alpha cluster states in excited $^{16}$O are not only of interest for the study of nuclear structure (e.g., the possible existence of 4$\alpha$ linear chain configuration), but also crucial in understanding the helium burning of stellar nucleosynthesis (e.g., the $^{12}$C+$\alpha$ reaction rate). The $^{13}$C($\alpha$,n) reaction and the subsequent breakup of highly excited $^{16}$O nucleus via th ... More
Presented by Wanpeng TAN
Type: Oral Presentation
Within the framework of a simple, analytic, parameter free, new symmetry, proxy-SU(3), the deformation variables beta and gamma were obtained for nuclei in the rare-earth region. The results show the predicted evolution of nuclear shapes and that there is both prolate dominance and the prolate-oblate shape change transition around N~116 around Z~76. This talk will focus on a comparison between the ... More
Presented by R.Burcu CAKIRLI
Type: Oral Presentation
About half of the heavy elements in the Solar System were created by rapid neutron capture, i.e. r-process nucleosynthesis. The nuclear physics inputs, such as nuclear masses, beta decay half-lives, neutron capture reaction rates and fission probabilities, are very important data for r-process calculations. The evaluation of -decay rates, particularly at the waiting point nuclei, is one of the im ... More
Presented by Prof. Zhihong LI, Mr. Yong ZHOU
Type: Poster Presentation
The beyond mean field effects on nuclear triaxiality are studied by applying the projected total energy surface (PTES) calculations to the light tungsten isotopes $^{170-178}$W, which have been well described as prolate rotors within the mean field approximation. The present PTES calculations have well reproduced the experimental energies of the yrast states and the available experimental tran ... More
Presented by Ms. liu LING
Type: Poster Presentation
The Isobaric Multiplet Mass Equation (IMME) is the most fundamental prediction in nuclear physics based on the concept of isospin. However, the IMME does not in itself provide any information on the nature of the charge-violating nuclear interactions. One related long-standing question is the microscopic origin of the Nolen-Schiffer anomaly found in the Coulomb displacement energy of mirror nuclei ... More
Presented by Jianmin DONG
Type: Poster Presentation
Transition strength functions are important for $\gamma$-spectroscopy, nucleosynthesis and $\beta\beta$ decays. Centroids of strength functions reveal information of giant resonances, validity of the Brink-Axel hypothesis, quenching and so on. In the framwork of shell model, we develope a simple tool to fastly evaluate centroids of strength functions for one-body transitions. Centroids are ... More
Presented by Yi LU
Type: Oral Presentation
The chiral geometry in the chiral doublet bands observed in $^{128}$Cs is revealed based on the angular momentum projection approach. By projecting the triaxial Hartree-Fock-Bogoliubov state onto good angular momentum, the experimental signatures of the chiral doublet bands are reproduced. The orientation of the angular momentum with respect to the intrinsic frame is revealed in terms of the distr ... More
Presented by Fang-Qi CHEN
Type: Invited talk
In this talk, I will present new theoretical results on the exotic structure of some light nuclei. We develop the nuclear cluster model and apply it to Be isotopes. The abnormal ground state of $^{11}$Be and its neutron halo is reproduced by the cluster model. The theoretical results are also in good agreement with the data of Be isotopes. Some discussions on cluster structure of other nuclei are ... More
Presented by Zhongzhou REN
Type: Invited talk
The interaction of the atomic nucleus with an electromagnetic radiation gives rise to the excitation of various modes of different spin and parity which provide useful information on the nuclear structure. Among them of special importance to nuclear astrophysics is the electric dipole response which is generally dominated by a strong, collective isovector nuclear vibration. Recently, in nuclei wit ... More
Presented by Dr. Anton P. TONCHEV
Type: Oral Presentation
Neutron star interiors are the only laboratory to harbor cold (temperatures less than tens of MeV) and dense (densities higher than normal nuclear density but lower than those where perturbative QCD is applicable) matter in the universe. In this talk, I will report on our recent endeavors to answer the intriguing question: are exotic degrees of freedom realized in the densest cores of the most com ... More
Presented by Dr. Sophia HAN
Type: Invited talk
Accreting neutron stars are unique stellar laboratories to probe high-density matter. Accretion onto the neutron star surface drives a host of nuclear processes which power or modify astronomical observables such as Type-I X-ray bursts, X-ray superbursts, and quiescent cooling following accretion outbursts. Uncertainties in key nuclear reaction rates impact model predictions of these astrophysical ... More
Presented by Prof. Z. MEISEL
Type: Invited talk
Density functional theory (DFT) provides a very successful description of nuclear structure in medium heavy and heavy nuclei. Originally it was introduced for the evaluation of ground state properties, but modern extension beyond mean field allow also the calculation of spectroscopic properties. Covariant density functional theory (CDFT) takes into account full Lorentz invariance, a basic symmetry ... More
Presented by Peter RING
Type: Oral Presentation
The photodisintegration reaction cross-sections for $^{94}Mo$($\gamma$,n) and $^{90}$Zr($\gamma$,n) have been experimentally investigated with quasi-monochromatic photon beams at the High Intensity $\gamma$-Ray Source (HI$\gamma$S) facility, Triangle University Nuclear Laboratory (TUNL). The measurements were focused primarily on studying the energy dependence of the photoneutron cross sections, w ... More
Type: Oral Presentation
Gamma-ray data from nuclear reactions are important for a large range of applications, as well as for basic sciences. In particular, gamma-ray data to extract photon strength functions and photonuclear cross sections are necessary for energy, safety and medical applications as well as for nuclear physics and astrophysics. There is a wealth of reaction gamma-ray data related to photonuclear react ... More
Type: Invited talk
The neutron skin and halo structures have attracted much attention from the experimental and theoretical point of view. The neutron skin thickness is supposed to have correlations with symmetry energy parameters in the nuclear equation of state, and thus a lot of studies on the skin thickness have been performed. On the other hand, the neutron halo is one of the most exotic structures in nuclear p ... More
Type: Invited talk
Halo nuclei have served as benchmark systems for understanding nuclear structure and correlations at the limit of stability. Valence neutrons with spatially extended wave functions are expected to provide a new degree-of-freedom in collective modes, inducing so-called soft collective motions. However, the experimental information on halo excitation modes has been limited so far to the E1 mode, ham ... More
Presented by Hiro IWASAKI
Type: Oral Presentation
Transmutation and reduction of high level radioactive wastes (e.g. minor actinides) produced in nuclear reactors are expected by an accelerator driven system (ADS). Japan Atomic Energy Agency proposed that Pb and Bi are used as a spallation target and coolant. The neutronics design was performed without including $^{205}$Pb, which is a long-lived radioactive nuclide with half-life of 1.7$\times$10 ... More
Type: Oral Presentation
We have recently presented for the first time a direct evidence of isospin conservation in neutron-rich systems by obtaining the fission fragment mass distribution of heavy nuclei in heavy ion induced fission reactions [1, 2]. In this paper, we present another evidence of isospin effects in nuclear fission by comparing the fission widths for reactions involving different isospin states of CN. Yadr ... More
Presented by Swati GARG
Type: Invited talk
The study of differences in excitation energy between analogue states in isobaric multiplets allows to verify the validity of isospin symmetry and independence as a function of the angular momentum. These differences are of the order of tens of keV and can be well reproduced by state-of-the-art shell model calculations. Several nuclear structure properties can be deduced from these data, such ... More
Presented by Silvia LENZI
Type: Oral Presentation
We study exotic structure of medium heavy hypernuclei with core nuclei of Ar isotopes and 40 Ca . Particulary, the superdeformed (SD) states and the corresponding hypernuclei are calculated in the frame of the Skyrme Hartree-Fock (SHF) + BCS model together with a microscopic Λ N interaction. We found that the Λ separation energy of the ground state is larger than that of the SD state. The result ... More
Presented by Prof. Zhou XIAN-RONG
Type: Invited talk
Pairing in exotic nuclei is a subject of active research in nuclear physics. Of particular interest is the competition between isovector and isoscalar "Cooper pairs", expected to occur in nuclei near the N=Z line [1].  In this talk, we will review possible signatures of neutron-proton  pairing and confront experimental data with theoretical expectations.  Special emphasis will be give ... More
Presented by Augusto MACCHIAVELLI
Type: Oral Presentation
Beside the GDR, many nuclei show the feature of additional low-lying electric dipole (E1) strength below and around the particle thresholds, which is usually denoted as Pygmy Dipole Resonance (PDR) [1]. The existence of the PDR in nearly every studied nucleus and the smooth variation of its properties lead to the assumption that the PDR is a newly discovered collective mode, however, its detailed ... More
Presented by Deniz SAVRAN
Type: Oral Presentation
New regimes of science are being experimentally studied at high energy density facilities around the world, spanning drive energies from microjoules to megajoules, and time scales from femtoseconds to microseconds. The ability to shock and ramp compress samples to very high pressures and densities allows new states of matter relevant to planetary and stellar interiors to be studied. Shock driven h ... More
Presented by Dr. Bruce REMINGTON
Type: Invited talk
Thermal neutron capture gamma-ray spectroscopy and prompt gamma-ray spectroscopy of fission fragments are powerful tools to obtain detailed nuclear structure information for nuclides close to stability and medium mass neutron-rich isotopes. These nuclear structure information can be used for the test of nuclear models, as well as for the extraction of quantities important for nuclear ap ... More
Presented by Caterina MICHELAGNOLI
Type: Invited talk
Accelerated beams of radioactive, refractory isotopes have been realized at ATLAS benefiting from the operation of the Californium Rare Ion Breeder Upgrade (CARIBU) facility. As part of the commissioning activities, beams of Cs-141 and Cs-142 ions from CARIBU were charge bred and, subsequently, accelerated to $\sim$6 MeV/A before being transported to the target location of the Gammasphere spectrom ... More
Presented by Dr. Shaofei ZHU
Type: Invited talk
J. Jolie, J.-M. Régis, S. Ansari,* N. Saed-Samii, N. Warr, and the EXILL&FATIMA collaboration Institut für Kernphysik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany *: present adress: CEA de Saclay, IRFU, 91191 Gif-sur-Yvette, France Abstract: Several lifetimes or lifetime limits were measured in the even-even 90Kr, 94Sr, 96 Sr, 98Sr, 98Zr, 100Zr, and 102Zr isoto ... More
Presented by Jan JOLIE
Type: Invited talk
Low-background experiments with stable ion beams are an important tool for putting the model of stellar hydrogen, helium, and carbon burning on a solid experimental foundation. The pioneering work in this regard has been done by the LUNA collaboration at Gran Sasso, using a 0.4 MV accelerator. The present talk will review the status of the project for a higher-energy underground accelerator in Fel ... More
Presented by Daniel BEMMERER
Type: Oral Presentation
In the last decade, large efforts were made in the community to improve models of the fission process and of the de-excitation of fission fragments. This is performed through Monte Carlo simulations that take into account prompt neutrons and gamma-ray emission. Beside the fundamental aspect, the goal is to better predict (with lower uncertainties) some of the constrains in nuclear reactor design, ... More
Presented by Dr. Thomas MATERNA
Type: Poster Presentation
The total charge-changing reaction cross-sections and the partial cross-sections of projectile fragments(PFs) production for the fragmentation of 12C on C, Al, Cu, Pb and CH2 targets at the highest energy of 400 A MeV are investigated. It is found that the total charge-changing cross-sections and the partial cross-sections of PFs production for the fragmentation is independent of the beam energy, ... More
Presented by Prof. Dong-Hai ZHANG
Type: Invited talk
The talk will present an overview of the planned Facility for Rare Isotope Beams, FRIB, and its current status.  The facility is based on a high-power, heavy-ion, superconducting linear accelerator that is designed to deliver at least 400kW at 200 MeV/u for all beams. A three-stage fragment separator will separate rare isotope beams that can be used in experiments at high energy or stopped and re ... More
Type: Oral Presentation
Inelastic proton scattering at energies of a few 100 MeV and forward angles including 0° provides a novel method to measure the Gamma Strength Functions (GSF) in nuclei in an energy range of about 5 – 25 MeV [1-4]. The experiments provide not only the E1 but also the M1 part of the GSF [5]. The latter is poorly known in heavy nuclei [6]. A fluctuation analysis of the high-resolution data also ... More
Presented by Prof. Peter VON NEUMANN-COSEL
Type: Invited talk
The statistical $\gamma$-decay from highly excited states is determined by the nuclear level density (NLD) and the $\gamma$ strength function ($\gamma$SF). These gross properties have been measured for several nuclei using the Oslo method. For the first time, we exploit the NLD and $\gamma$SF in order to evaluate the gamma-width in the energy region below the neutron binding energy, often called t ... More
Presented by Prof. Magne GUTTORMSEN
Type: Oral Presentation
According to standard stellar evolution, lithium abundance is believed to be a useful indicator of the stellar age. However, many evolved stars like red giants show huge fluctuations around expected theoretical abundances that are not yet fully understood. The better knowledge of nuclear reactions that contribute to the creation and destruction of lithium can help to solve this puzzle. In this wor ... More
Presented by Dr. Guoxiang DONG
Type: Invited talk
Nuclei have spin- and isospin-degrees of freedom. Therefore, Gamow-Teller (GT) transitions caused by the $\sigma\tau$-operator (spin-isospin operator) are unique tools for the studies of nuclear structure as well as nuclear interactions. In addition, they can be studied in $\beta$ decays as well charge-exchange (CE) reactions. Combined efforts of these studies can give us an overview of nuclear GT ... More
Presented by Prof. Y. FUJITA
Type: Invited talk
A simple interpretation in the framework of the shell model of the spectroscopic properties of few-nucleon systems is presented. The nucleus $^{212}$Po is taken as an example, corresponding to two neutrons (2n) and two protons (2p) in the relevant valence shells. The analysis is based on a closed expression for the 2n-2p matrix elements of a two-body interaction and reveals the existence of a mixe ... More
Presented by Piet VAN ISACKER
Type: Oral Presentation
Inspired by the increased experimental observations and theoretical interest to the high-K isomeric states in exotic nuclei, take light superheavy nuclei and the neutron rich nuclei for example, the high-$K$ isomeric states in $A\sim250$ mass region and in Samarium, Gadolinium and Hafnium neutron rich isotopes are investigated systematically by the Cranked Shell Model (CSM) with pairing correlatio ... More
Presented by XiaoTao HE
Type: Oral Presentation
The astrophysical p-process is an important way of nucleosynthesis to produce the proton-rich, stable nuclides beyond Fe which can not be reached by the s- and r-process. The common picture is that these nuclides are synthesized by photodisintegration of pre-existing s- and r-process nuclei. In the present study, the impacts of different nuclear ingredients on the astrophysical reaction rates for ... More
Presented by Dr. yi XU
Type: Oral Presentation
We have implemented a new variation after projection (VAP) calculation based on a time-odd Hartree-Fock (HF) mean field. The exact Hessian matrix of the projected energy has been successively evaluated for the first time, which makes the VAP calculation much stable. With the time-odd mean field, the present VAP can be applied to the yrast states not only in the even-even nuclei, but also in the od ... More
Presented by Dr. Zao-Chun GAO
Type: Oral Presentation
A continuing challenge in nuclear structure physics is the determination of the nature of low-lying excited 0$^+$ states. Various approaches have been implemented to interpret the occurence of low-lying excited 0$^+$ states include vibrational excitations in $\beta$-phonons and $\gamma$-phonons, as well as pairing excitations. A further complication is the presence of shape coexistence which can i ... More
Type: Oral Presentation
The $\gamma$-ray strength function is an important input parameter for the calculation of nucleosynthesis processes. To study the dipole response in more detail, the $\gamma$-decay behavior of the \textit{fp} shell nuclei $^{48,50}$Ti and $^{52}$Cr was investigated with the high-efficiency \mbox{$\gamma^3$ setup} \cite{NIM} at the High Intensity $\gamma$-ray Source facility at TUNL in Durham, US ... More
Presented by Julius WILHELMY
Type: Poster Presentation
Isomers have taken a center stage in nuclear physics as they provide useful information to study the nuclear structure properties. Isomers usually indicate the significant change in nuclear structure, especially for the isomers around the doubly-magic or semi-magic nuclei. We have performed an experiment of isochronous mass spectrometry to measure the projectile fragment of $^{112}$Sn at the "sout ... More
Presented by Dr. Peng SHUAI
Type: Oral Presentation
The pairing correlation is very important in nuclear physics. Isovector nucleon pairs with spin $J = 0$ are found to be dominant ingredients in low-lying states of semimagic nuclei. The isovector $J = 0$ pairing correlation plays a key role in nuclear infinite matter. These facts are the consequences of the strong isovector $J = 0$ pairing interaction between nucleons. On the other hand, the effec ... More
Presented by GuanJian FU
Type: Poster Presentation
The masses are the basic properties of atomic nuclei. In this talk, we will discuss the Garvey-Kelson mass relations as one of the best example schemes of local nuclear mass relations and, report in particular our recent results of researches which we have carried out in the Shanghai Jiao Tong University. The essential point is how to use and improve the Garvey-Kelson relations.
Presented by Hui JIANG
Type: Oral Presentation
Spectroscopy of electrons originating from nuclear processes provides an important tool for nuclear structure investigations. Electron measurements are particularly relevant in the study of electric monopole (E0) transitions connecting $0^+$ states, since they have no competing gamma rays and only internal conversion electron or pair production (if $E > 2mc^2$) processes are possible. Recen ... More
Type: Oral Presentation
The $^{12}$C+$^{16}$O reaction plays a particularly important role for both carbon and oxygen burning phases of stars, due to the $^{12}$C($\alpha$,$\gamma$)$^{16}$O reaction. However, its cross section has not been determined with enough precision within Gamow window, despite numerous studies, due to the extremely low reaction cross sections and the large experimental background. The total cross ... More
Presented by Dr. Xiao FANG
Type: Poster Presentation
Neutron capture yield for enriched {162}^Dy and {164}^Dy samples was measured at the Materials and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC) using time-of-flight method. NaI(Tl) spectrometer was used to measure gamma-rays from the capture reaction. Neutron flux shape was measured using 10B enriched B4C. Scattering background was estimated us ... More
Presented by Prof. Guinyun KIM
Type: Oral Presentation
An incredible wealth of information is obtained from investigating the low-energy tail of the Giant Electric Dipole Resonance. The Photon Strength Function (PSF) is one of the quantities that is successfully used to gain nuclear structure knowledge of resonance features in the region of the quasi-continuum. Further, the PSF and nuclear level density (NLD) are input parameters for calculations of r ... More
Presented by Mathis WIEDEKING
Type: Oral Presentation
As part of the ImPACT Project, research into the $(n,\gamma)$ cross-sections of the long-lived fission products (LLFPs) $^{135}$Cs and $^{179}$Se is ongoing, using the neutron time-of-flight (nTOF) method at the ANNRI/MLF/J-PARC facility. The $(n,\gamma)$ cross-section of stable $^{133}$Cs has been measured and analyzed. Experiments have been conducted for $^{135}$Cs, as well as the stable isotope ... More
Presented by Brian HALES
Type: Oral Presentation
The $^{12}$C$(\alpha,\gamma)^{16}$O reaction is one of the most important for the field of nuclear astrophysics. It strongly influences how massive stars evolve and is even sensitive to the rate of nucleosynthesis of the weak $s$-process. After 40+ years of measurements, significant improvement in our understanding of the reaction has been achieved, yet the desired level of uncertainty remains jus ... More
Presented by Richard DEBOER
Type: Oral Presentation
Two pairs of positive-and negative-parity doublet bands together with eight strong electric dipole transitions linking their yrast positive- and negative-parity bands have been identified in 78Br. They are interpreted as multiple chiral doublet bands with octupole correlations, which is supported by the microscopic multidimensionally-constrained covariant density functional theory and triaxial par ... More
Presented by Chen LIU
Type: Oral Presentation
Neutron capture cross sections on Sn isotopes are calculated with available experimental and theoretical predicted inputs. We analyse the contributions from the direct capture cross sections and compound nucleus. Reasonable evaluation of total neutron capture cross sections are used to provide reaction rates for the simulation of the rapid neutron capture process to produce heavier elements.
Presented by 时声 张
Type: Oral Presentation
A Re/Os nucleo-cosmochronometer has been proposed to date a rapid neutron-capture process (r-process) in nucleosynthesis. Rhenium-187 is primarily considered a pure r-process nuclide and has a long half-life of 43.5 Gyr. Thus, the $^{187}$Re/$^{187}$Os abundance ratio changing with the $^{187}$Re half-life can be a good chronometer for the r-process. However, slow neutron-capture process (s-proces ... More
Presented by Dr. Tatsuya KATABUCHI
Type: Invited talk
Neutron capture on unstable nuclei is important in the synthesis of heavy nuclei and in applications. Direct measurements of (n,$\gamma$) cross sections are only possible for lifetimes longer than ≈100 days. Therefore, a surrogate needs to be validated and with radioactive ion beams (RIBs) to deduce (n,$\gamma$) cross sections of short-lived isotopes. While (n,$\gamma$) cross sections can be ... More
Presented by Prof. Jolie CIZEWSKI
Type: Invited talk
One of the major open questions in the field of nuclear astrophysics concerns the origin of the heavy elements. About half of the isotopes of elements beyond iron are produced in the astrophysical r process. Although the general characteristics of the process have been known for a while, the astrophysical site where it takes place has not been unambiguously determined. Significant uncertainties in ... More
Presented by Artemis SPYROU
Type: Oral Presentation
We report on our ongoing program involving neutron capture cross-section measurements in the 0.3 to 15 MeV energy range on nuclei of interest to fundamental physics and applications. Here we refer to nuclei of importance to rare event searches, diagnostic tools with focus on the National Ignition Facility, and stewardship science with focus on actinide nuclei.
Presented by Prof. Werner TORNOW
Type: Poster Presentation
Among the various activation analysis methods, the prompt gamma-ray activation analysis (PGAA) methods has found wide applications outside nuclear reactor facilities which has proved valuable in diverse areas consisting in monitoring the concentration of elements and pollutants, in environmental bodies, in mineral surveys of the sea bed, and in in vivo body composition analyses, etc. The disk chop ... More
Presented by Dr. Sy Minh Tuan HOANG
Type: Oral Presentation
M. Devlin, J. A. Gomez, K. J. Kelly, J. M. O'Donnell, R. C. Haight, H. Y. Lee, T. N. Taddeucci, S. Mosby, N. Fotiades, J. L. Ullmann, M. C. White, D. Neudecker, P. Talou, and M. Rising Los Alamos National Laboratory C. Y. Wu, B. Bucher, M.Buckner, and R. Henderson Lawrence Livermore National Laboratory Prompt Fission Neutron Spectrum (PFNS) measurements for fast neutron-induced fission ... More
Presented by Matthew DEVLIN
Type: Oral Presentation
The clock burster GS 1826-24 exhibits remarkably regular luminosity and recurrence time of Type I X-ray burst (XRB) ever since. It has still been the subject of investigation to constrain XRB models, though its unusually consistent bursting feature broke down recently. Some XRB model with configurations deduced by Heger et al. (2007) almost agrees with the observed luminosities of GS 1826-24, and ... More
Presented by Yi Hua LAM
Type: Invited talk
The need for nuclear data far from the valley of stability, for applications such as nuclear astrophysics, challenges the robustness as well as the predictive power of present nuclear models. Most of the nuclear predictions are still performed on the basis of phenomenological nuclear models. For the last decades, important progress has been achieved in fundamental nuclear physics, making it now fe ... More
Presented by Prof. S. GORIELY
Type: Oral Presentation
Study of proton emitters with triaxial deformation leads to an accurate identification of the triaxiality in exotic nuclei where the experimental data are scarce [1]. We have developed a microscopic nonadiabatic approach to study the structure and decay properties of proton emitters [2]. In this model the angular momenta of the particle states couple to the rotor states through a coupling matrix g ... More
Presented by Ms. Swati MODI
Type: Poster Presentation
For studying dense matter and compact stars from the quark level, we extend the quark-meson coupling (QMC) model with an additional central potential for the describing of the nucleon in free space, to take into account the interactions and spin correlations between current quarks. Then the nucleons interact with each other through exchanging $\sigma$, $\omega$, and $\rho$ mesons between quarks i ... More
Presented by zhenyu ZHU
Type: Invited talk
The new research facility Extreme Light Infrastructure - Nuclear Physics (ELI-NP) is under construction in Romania, in the Magurele Physics Research Campus, near Bucharest. Valued at more than 300 millions euro the center will become operational in 2019. This interdisciplinary facility will combine two novel large equipment with unprecedented characteristics worldwide to implement a unique scienti ... More
Presented by Victor ZAMFIR
Type: Oral Presentation
The determination of nuclear shapes is of utmost importance for nuclear structure physics, since shapes are a direct consequence of the strong interactions among protons and neutrons. Triaxial shapes are of specific interest, although triaxiality in the ground state is a rather common phenomenon. Nevertheless, in most known cases, these shapes are soft, and only few examples [1] across the nuclear ... More
Presented by Volker WERNER
Type: Oral Presentation
The study of $^{122}$Xe is a part of a systematic examination of the development of collectivity in the Xe isotopes, which are located in the $Z>50$, $N<82$ region and display an extraordinarily smooth evolution of simple collective signatures. The collectivity of excited states in the Xe isotopes is not well characterized because of a general lack of spectroscopic data for low-spin stat ... More
Type: Invited talk
Nuclear fusion reactions are the heart of nuclear astrophysics: they sensitively influence the nucleosynthesis of the elements in the earliest stages of the universe and in all the objects formed thereafter, and control the associated energy generation, neutrino luminosity, and evolution of stars. LUNA (Laboratory for Underground Nuclear Astrophysics) is an experimental approach for the study ... More
Presented by Francesca CAVANNA
Type: Invited talk
The Accelerator Laboratory of the University of Jyväskylä, Finland, provides users with a wide range of ion beams from protons to isotopes of Au with intensities of up to 100 particle nA. Majority of the beam time is allocated to studies of atomic nuclei. The Nuclear Spectroscopy Group utilizes in-beam gamma-ray and electron as well as decay-spectroscopic methods to shed light on nuclear structu ... More
Presented by Janne PAKARINEN
Type: Invited talk
TRIUMF is home to the ISAC rare isotope facility, which uses the 520 MeV proton cyclotron as a driver for its ISOL based isotope production. The ISAC facility has been in operation since 1998 and provides experimental opportunities in three areas: 1) the low energy area where ground state property of isotopes are measured 2) a post accelerated area, where reaction-based measurements with energies ... More
Presented by Jason HOLT
Type: Oral Presentation
Nuclei with a few valence particles and/or holes outside of a doubly magic nucleus are essential in the fundamental understanding of nuclear structure. In particular, the exotic nuclei located in the vicinity of $^{132}$Sn ($Z=50,N=82$) have received much attention because $^{132}$Sn is doubly magic while lying far away from the line of $\beta$ stability. It thus provides an opportunity to explore ... More
Presented by He WANG
Type: Oral Presentation
The shape coexistence phenomenon is related with the presence in the same energy region of eigenstates with different deformations. The lead region is considered as a paradigm for shape coexistence and several decades of experimental effort have supported this believe. In particular, long chains of the Pb, Hg, Pt and Po isotopes have been measured and a rich experimental body of data concerning, e ... More
Presented by Jose-Enrique GARCIA-RAMOS
Type: Invited talk
The origin of both neutron-rich and proton-rich heavy elements has not yet been clearly understood although sixty years have already passed since B2FH (1957). Core-collapse supernova (SN) or binary neutron-star merger (NSM) is undoubtedly a viable candidate site for these heavy elements. We will discuss the effects of neutrino interactions and flavor oscillations on the r-process and vp-process ... More
Presented by Prof. Taka KAJINO
Type: Oral Presentation
The Cd isotopes have been traditionally considered to be a prime example of spherical vibrators. Recently, advanced experimental studies have reported significant deviations from this behavior in selected two- and three-phonon states, along the Cd chain (A=108-126) [1-3]. Attempts to explain these deviations in terms of strong mixing between the normal spherical [U(5)-like] states and ... More
Presented by Prof. Amiram LEVIATAN
Type: Invited talk
We present photoneutron reaction data in terms of the $\gamma$-ray strength function ($\gamma$SF) and partial GDR cross sections in conjunction with the photonuclear data project, IAEA-CRP F41032 [1]. The ($\gamma$,n) and (n,$\gamma$) cross sections are interconnected through the $\gamma$-ray strength function ($\gamma$SF) based on the Brink hypothesis of the approximate equality of the upward a ... More
Presented by Hiroaki UTSUNOMIYA
Type: Invited talk
Mass measurements of short-lived nuclei have been conducted using an isochronous mass spectrometry (IMS) technique at HIRFL-CSR (Cooler Storage Ring) in Lanzhou. The radioactive nuclei were produced by projectile fragmentation and injected into the experimental storage ring CSRe. Revolution times of the ions stored in the CSRe were measured, from which masses of short-lived nuclei have been determ ... More
Presented by Dr. Meng WANG
Type: Oral Presentation
The study of the properties of the nuclear scissors mode provides an essential insight into the nature of the restoring forces between the proton and neutron subsystems. Hence, the isovector low-lying $J_K^{\pi}=1_1^+$ scissors mode of deformed nuclei has been studied extensively in the past with main focus on strong $M1$ transitions to the ground-state band. Despite the quadrupole-collective orig ... More
Presented by Tobias BECK
Type: Oral Presentation
The stable isotopes of xenon, which have attracted interest for a number of reasons, span a transitional region that evolves from $\gamma$-soft structures for the lighter mass isotopes [1] to nearly spherical $^{136}$Xe with a closed neutron shell. The nature of this transition, which is gradual, is not well understood [2]. Moreover, these nuclei are difficult to study, as the required targets f ... More
Presented by E. E. PETERS
Type: Oral Presentation
The production and study of very neutron-rich nuclei are of significant importance for nuclear physics and nuclear astrophysics. However, so far, only few neutron-rich nuclei near the stability have been measured, while most neutron-rich nuclei have not been experimentally investigated due to their small production cross sections. Very brilliant and intense gamma beams planned at ELI-NP provide ne ... More
Presented by Bo MEI
Type: Invited talk
Jinping Underground laboratory for Nuclear Astrophysics (JUNA) project takes the advantage of the ultra-low background of CJPL lab, high current accelerator and highly sensitive detectors to directly measure a number of crucial reactions occurring at their relevant astrophysical energies. In current phase, JUNA aims at the direct measurements of $^{25}$Mg(p,$\gamma$)$^{26}$Al, $^{19}$F(p,$\alpha$) ... More
Presented by Prof. Weiping LIU
Type: Invited talk
Recent commissioning of the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou enabled us to conduct high-precision mass measurements at the Institute of Modern Physics in Lanzhou (IMP). In the past few years, mass measurements were performed using the CSRe-based isochronous mass spectrometry employing the fragmentation of the energetic beams of $^{36}$Ar, $^{58}$Ni, $^{78}$Kr, $^{8 ... More Presented by Yuhu ZHANG Type: Invited talk Neutron capture cross sections of unstable isotopes are important for neutron-induced nucleosynthesis as well as for technological applications. A combination of a radioactive beam facility, an ion storage ring and a high flux reactor or a spallation source would allow a direct measurement of neutron induced reactions over a wide energy range on isotopes with half lives down to minutes. The idea ... More Presented by Rene REIFARTH Type: Invited talk The pattern of abundances produced in rapid neutron capture (r-process) nucleosynthesis depends on thousands of nuclear properties and reaction rates for which little to no experimental information is currently available. Here we describe work to place realistic theoretical error bars due to these nuclear uncertainties on the output of r-process simulations. We consider the impact of uncertain nu ... More Presented by Dr. Rebecca SURMAN Type: Poster Presentation The p process of nucleosynthesis is responsible for the production of the stable neutron-deficient nuclei heavier than iron observed in the solar system. The most favoured scenarios proposed for the p process involve the photodisintegration through a series of (γ,n), (γ,p), and (γ,α) reactions of intermediate and heavy elements at high temperatures (2–3 10^9 degrees Kelvin) that can be achie ... More Presented by Paraskevi DIMITRIOU Type: Invited talk "Exotic nuclei" far from the stability line are unique objects of many-body quantum system, where ratios of neutron number to proton number are much larger or much smaller than those of nuclei found in nature. Their exotic properties and phenomena emerge from their large isospin asymmetry, and even affect scenarios of nucleosynthesis in universe. To access nuclei far from the stability ... More Presented by Hiroyoshi SAKURAI Type: Oral Presentation For the ISOLTRAP and the ISOLDE collaboration https://isoltrap.web.cern.ch/isoltrap/ https://isolde.web.cern.ch/ The multi-reflection time-of-flight mass separator/spectrometer (MR-ToF MS) [1, 2] installed at the ISOLTRAP setup [3] at ISOLDE at CERN has proven to be a valuable asset to the setup, allowing fast identification of the incoming ion beams [4] and selection and transfer of only ... More Presented by Frank WIENHOLTZ Type: Oral Presentation In this contribution, we discuss a recent progress in respect to the sign problem in the Onishi formula [1], which plays a central role in the Hartree–Fock–Bogoliubov (HFB) method. The sign problem has been a long-standing issue in theoretical nuclear many-body physics. The HFB gives a salient description for nuclear many-body phenomena as a mean-field approximation. To go beyond mean-fiel ... More Presented by Noritaka SHIMIZU, Dr. Takahiro MIZUSAKI Type: Invited talk Super-deformation is considered one of the most exciting discoveries in nuclear physics in the recent times, which arise due to the strong shell effects arising at specific nucleon numbers. In this talk, we revisit the Super-deformed (SD) bands from a semi-classical perspective. More specifically, we present the results from a semi-classical analysis of the particle-rotor and the cranking models. ... More Presented by Ashok Kumar JAIN Type: Oral Presentation Without going through specific nuclei or shell gaps, universal roles of central, tensor, and spin–orbit forces can be proved, reflecting the intrinsic features of shell model effective interactions. For monopole matrix elements, even and odd channels of central force often have a canceling effect. However, for the contributions to the shell evolution, its even and odd channels could have both po ... More Presented by Dr. Wang XIAOBAO Type: Invited talk We developed a cluster model which allows taking into account both shape deformation parameters and cluster degrees of freedom. In the proposed model the mass asymmetry variable which describes the partition of nucleons between the clusters is used as a collective coordinate. The collective motion in mass asymmetry leads to the admixture of very asymmetric cluster configurations to the intrinsic n ... More Presented by Timur SHNEIDMAN Type: Invited talk The way how the complex nuclear forces form atomic nuclei from their constituent protons and neutrons represents the core topic of nuclear structure research. The evolution of nuclear structure across the nuclear chart is dominated by the evolution of single-particle orbitals as a function of the numbers of protons and neutrons that make up the nuclei. The understanding of shell evolution has ... More Presented by Norbert PIETRALLA Type: Invited talk The region of proton-rich nuclei around the N=Z offers a rich testing ground for various nuclear models. Rapid shape changes have been observed between from prolate deformation in 76Kr to an oblate ground state in$^{72}$Kr. Based on the comparison with its mirror nucleus$^{70}$Se, an oblate shape is expected for$^{70}$Kr. Breaking of isospin symmetry as well as the proximity to the proton drip ... More Presented by Kathrin WIMMER Type: Oral Presentation On behalf of Leuven-Gatchina-ISOLDE-Mainz-Manchester-York and Windmill-ISOLTRAP-RILIS collaboration. The competition between spherical and deformed nuclear configurations at low energy gives rise to shape coexistence in the neutron-deficient isotopes around Z~82 and N~104. Along the isotope chain of a number of elements this leads to an abrupt change in the mean-square charge radius of the nucl ... More Presented by Andrei ANDREYEV Type: Invited talk In this contribution, I will present systematic calculations on the spectroscopy and transition properties of intermediate-mass and heavy nuclei around$^{100}$Sn and$^{208}$Pb by using the large-scale configuration interaction shell model approach with realistic interactions. Those nuclei are of interest since they are the longest isotopic chains that can be studied by the nuclear shell model an ... More Presented by Chong QI Type: Poster Presentation High-spin states of 80^Rb are studied via the fusion-evaporation reactions 65^Cu+19^F,66^Zn+18^O, and 68^Zn+16^O with the beam energies of 75 MeV, 76 MeV, and 80 MeV, respectively. Twenty-three states with twenty-eight γ transitions are added to the previously proposed level scheme, where the second negative-parity band is signiﬁcantly pushed up to spins of 22^− and 15^− and two sidebands ... More Presented by Shuifa SHEN Type: Oral Presentation We have investigated the monopole, dipole, and quadrupole collective modes in weakly bound deformed 40Mg, based on the newly developed fully self-consistent deformed continuum FAM-QRPA in large spatial spaces. Recently there are strong experimental interests in the spectroscopy of 40Mg. The so-called “soft” or “pygmy” resonances, corresponding to the relative motion between the neutron ski ... More Presented by Junchen PEI Type: Invited talk Properties of deformed, neutron-rich nuclei in the A$\sim$160 region are important for achieving a better understanding of the nuclear structure in this region where little is known owing to difficulties in the production of these nuclei at the present RIB facilities. These properties are essential ingredi- ents in the interpretation of the rare-earth peak at A$\sim$160 in the r-process abundan ... More Presented by Dr. F. G. KONDEV Type: Oral Presentation For the neutron-deficient nuclei in the A ~ 70 mass region, due to the large subshell gaps around Fermi surfaces in the single-particle spectra at prolate and/or oblate deformation for proton and neutron numbers 34, 36, and 38, they exhibit rich and varied shape-related phenomena, such as shape transition, shape coexistence, and triaxiality. The spectroscopy of N=42 nuclei 74Ge, 76Se, and 75As ... More Presented by Dr. Chuan XU Type: Invited talk Studies of isospin symmetry in the fp-shell (e.g. [1]) and more recently in the fpg region (e.g.[2,3]) have revealed strong evidence for inclusion of isospin non-conserving interactions in the theoretical (shell-model) description of nuclei. These interactions may have their root in the bare nucleon interaction (e.g. [3,4]). Of particular interest is the study of T=1 isobaric triplets, where the t ... More Presented by Michael BENTLEY Type: Poster Presentation Shell model (SM) is one of the most successful approaches to investigate nuclear many body problems. Its success entirely depends on the employed two body matrix elements (TBMEs) and model space. In SM calculations, the realistic TBMEs which can be obtained from elementary quark-level interactions, usually transfigure into effective values for a given model space to achieve more validate and under ... More Presented by Mr. Pawan KUMAR Type: Oral Presentation The most abundant Li star (M=1.13M$_{sun}$, Z=0.008) has been discovered recently with the Li abundance of A(Li)=4.24 at LAMOST. We suggest an interpretation for the formation of super Li-rich star based on the updated capture and decay rates of related light nuclei and on the proposed extra deep mixing (EDM) process happening in the radioactive zone of the RGB stage of low-mass stars, which is th ... More Presented by Prof. Yongshou CHEN Type: Invited talk High atomic charge states can significantly influence nuclear decay rates. An obvious example is the electron capture (EC) decay probability, which depends strongly on the number of bound electrons. One of the straightforward motivations for studying the beta-decay of highly charged ions (HCI) is that stellar nucleosynthesis proceeds at high temperatures, where the involved atoms are highly ionize ... More Presented by Dr. Yuri A. LITVINOV Type: Invited talk By considering the nucleus as a vibrating liquid drop, and assuming the potential to be a function of the elongation β, and triaxiality γ, of the nucleus, the Bohr Hamiltonian can be solved to give the so-called K=0⁺, β-vibrational and K=2⁺ γ-vibrational bands. However, as summarized in the review by Garrett[1], very few of the observed 0₂⁺ bands in deformed nuclei possess the properti ... More Presented by Robert BARK Type: Oral Presentation Investigation of the breakup and transfer effect of weakly bound nuclei on the fusion process has been an interesting research topic in the past several years. The beam intensities of stable weakly bound nuclei such as 6;7Li and 9Be, which have significant breakup probability, are orders of magnitude higher. Precise fusion measurements have already been performed with those stable weakly bound nuc ... More Presented by Dr. Gaolong ZHANG Type: Oral Presentation The photon strength function (PSF) serves as an essential input for nuclear astrophysical model calculations. It plays an important role in capture and photo-disintegration reactions as well as in astrophysical scenarios describing the nucleosynthesis of heavy elements. In the past, different experimental methods and approaches have been used to study the PSF, in particular the contribution from ... More Presented by Johann ISAAK Type: Invited talk Wobbling mode is uniquely related to the triaxial shape of nuclei. The signature of the rotational gamma-ray spectrum for a wobbling nucleus is the observation of$\Delta$I = 1, E2 inter-band transitions between the first wobbling band (n$_\omega$= 1) and the yrast band (n$_\omega$= 0). Based on the variation of the wobbling frequency with angular momentum of the nucleus, the wobbling motion can ... More Presented by Prof. Rudrajyoti PALIT Type: Invited talk With the inelastic neutron scattering (INS) reaction, nuclear levels are non-selectively (statistically) populated and low-spin, non-yrast states can be observed. Moreover, lifetimes in the femtosecond regime can be determined and transition probabilities can be extracted. These measurements permit the characterization of low-spin levels at low excitation energies particularly well and provide s ... More Presented by Prof. Steven YATES Type: Oral Presentation The in-depth study of the regions of Superheavy elements and the proton dripline around 100Sn are two major chalenges of todays’ Nuclear Physics. Performing detailed spectroscopic studies on these nuclei requires a significant improvement of our detection capabilities. The Super-Separator-Spectrometer S3 is part of the SPIRAL2 facility at GANIL. Its aim is to use the high stable beam currents ... More Presented by Julien PIOT Type: Invited talk Alpha decay is a powerful way to identify new nuclides and new elements in heavy and superheavy region [1-3]. The different methods to calculate$\alpha$-decayhalf-lives and branching ratios to various daughter states are discussed. Emphasis is placed on the microscopic models of the coupled channel calculations on$\alpha$-decay half-lives and branching ratios of heavy nuclei [4-9]. System ... More Presented by Prof. Zhongzhou REN Type: Oral Presentation The electric dipole is an important property of heavy nuclei. Precise information on the electric dipole response provides information on the electric dipole polarisability which in turn allows to extract important constraints on neutron-skin thickness in heavy nuclei and parameters of the symmetry energy. The tin isotope chain is particularly suited for a systematic study of the dependence of th ... More Presented by Mr. Sergej BASSAUER Type: Poster Presentation In contemporary nuclear physics, the synthesis of superheavy elements is one hot topic, whereas fundamental properties of these heaviest nuclei, such as nuclear charge radii, have been little recognized up to now. In this talk, we propose to make use of the available experimental data of alpha decay in superheavy nuclei to extract valuable information on nuclear radii. Within the density-dependent ... More Presented by Yibin QIAN Type: Oral Presentation$^{12}$C+$^{12}$C fusion reaction is one of the most important reactions in nuclear astrophysics. Various models provide quite different predictions for the averaged S factors at astrophysical energies, leading to a dramatic discrepancy in the reaction rate. Measurements of the non-resonant carbon isotope systems at deep sub-barrier energies provides a great opportunity to validate the predictive ... More Presented by Ningtao ZHANG Type: Poster Presentation During stellar helium burning, the rates of 3$\alpha$and the$^{12}$C($\alpha,\gamma$)$^{16}$O reaction, in competition with one another, determine the relative abundances of$^{12}$C and$^{16}$O in a massive star. The abundance ratio is the beginning condition of the following nucleosynthesis and star evolution of massive stars, which are extremely sensitive to the rate of$^{12}$C($\alpha,\gam ... More
Presented by zhendong AN
Type: Invited talk
The B(E1), B(M1) and B(E2) strength distribution in atomic nuclei is a key observable to derive basic properties of atomic nuclei and to test theoretical models. For this purpose different experimental techniques like, e.g., Coulomb excitation, electron scattering, Nuclear Resonance Fluorescence, Doppler-shift measurements, or fast timing approaches have been developed. This talk will discuss D ... More
Presented by Andreas ZILGES
Type: Poster Presentation
The region around N=40 has been extensively studied due to the property of a rapid structure evolution below $^{68}$Ni. In contrast to the high 2+ energy in $^{68}$Ni [1], the 2+ state energies of the neutron-rich iron and chromium isotopes decline from N = 38 and show a development of deformation [2]. The experimental study has shown the N=40 gap in this region to be fragile with the removal of p ... More
Presented by Xiaoyu LIU
Type: Oral Presentation
Masses of 5 atomic nuclei, $^{79}$Y,$^{81,82}$Zr,$^{83,84}$Nb, whose masses were not measured/well-determined on the rp-process pathway, have been precisely measured directly by the experimental storage-ring CSRe at Lanzhou. Besides，the masses of $^{80}$Zr and $^{84}$Mo are well extrapolated based on the these new measured masses. Extremely low $\alpha$ separation energies for neutron-deficient ... More
Presented by Yuanming XING
Type: Poster Presentation
The new laser-based Inverse Compton Scattering gamma-beam system at ELI-NP (Extreme Light Infrastructure - Nuclear Physics) in Bucharest will provide extremely high intensities at very narrow bandwidths. The Nuclear Resonance Fluorescence (NRF) technique gives access to several experimental quantities like excitation energies, level widths, $\gamma$-decay branching ratios, spin quantum numbers, an ... More
Presented by Julius WILHELMY
Type: Oral Presentation
About half of the elemental abundances between Fe and Bi are produced by the so-called s (slow) process of neutron capture reactions in AGB stars. Of particular importance are some nuclides produced during the s-process which are radioactive, with half-lives from years to Gy, so its decay process competes with the neutron capture chain: these nuclides are known as branching points. The measurement ... More
Type: Oral Presentation
This talk will review the shape transition/coexistence with regard to triaxial deformations in the neutron-rich region with Z = 41 - 46 and A ~ 101-116, with an emphasize on the very recent progresses in the studies. The systematic studies were mainly based on the triple-fold and/or four-fold coincident data of the prompt fission gammas measured at Gammasphere. Systematics of triaxial deformat ... More
Presented by Prof. Yixiao LUO
Type: Invited talk
Collective shape degrees of freedom have been a major direction in the study of the nuclear finite many-body problem for over 50 years. There is widespread evidence for quadrupole deformations, primarily of large prolate spheroidal deformation with axially symmetric rotor degrees of freedom. This naturally leads to the question of whether axially asymmetric rotor degrees of freedom are exhibited b ... More
Presented by Mitch ALLMOND
Type: Oral Presentation
A quantal and a semiclassical analysis of two-nucleon transfer intensities is done within the framework of the interacting boson model. The expected features of these quantities for the quantum phase transition (QPT) between spherical, U(5), and axially deformed, SU(3), shapes are discussed. Experimental data for (p, t) and (t, p) transfer reactions clearly show the occurrence of QPTs in Gd, ... More
Presented by Dr. Yu ZHANG
Type: Oral Presentation
The determination of basic properties of the so-called isobaric analog states(IASs) which are states with the same isospin ${T}$ and spin-parity $J^\pi$ in a fixed A isobar has long been an important research subject in nuclear physics. A famous and simple formula, isobaric multiplet mass equation (IMME), which is derived 60 years ago on the basis of the perturbation theory in Quantum Mechanics an ... More
Presented by Xing XU
Type: Oral Presentation
A potential energy surface is constructed for various light nuclei, $^{3,4}$He with the Argonne V18 potential and then for alpha-conjugate nuclei like $^{12}$C,$^{16}$O, $^{20}$Ne with alpha-alpha potentials. Despite the nucleons have large momenta and large fluctuations around the equilibrium points, the minimization suggests the underlying geometric structure. We calculate the Hessian matrix ... More
Presented by Lorenzo FORTUNATO
Type: Oral Presentation
The generalized seniority approach proposed by us in explaining the B(E2) properties of semi-magic nuclei has been widely successful [1-4]. In the present paper, we extend the generalized seniority scheme to obtain the g-factors in semi-magic nuclei. We find that the magnetic moment and the g-factor do show a particle number independent behavior as expected. The calculated trend explains the exper ... More
Presented by Bhoomika MAHESHWARI