| Title | Deformed relativistic Hartree-Bogoliubov theory in continuum with a point-coupling functional: Examples of even-even Nd isotopes |
| Authors | Zhang, Kaiyuan Cheoun, Myung-Ki Choi, Yong-Beom Chong, Pooi Seong Dong, Jianmin Geng, Lisheng Ha, Eunja He, Xiaotao Heo, Chan Ho, Meng Chit In, Eun Jin Kim, Seonghyun Kim, Youngman Lee, Chang-Hwan Lee, Jenny Li, Zhipan Luo, Tianpeng Meng, Jie Mun, Myeong-Hwan Niu, Zhongming Pan, Cong Papakonstantinou, Panagiota Shang, Xinle Shen, Caiwan Shen, Guofang Sun, Wei Sun, XIang-Xiang Tam, Chi Kin Thaivayongnou Wang, Chen Wong, Sau Hei Xia, Xuewei Yan, Yijun Yeung, Ryan Wai-Yen Yiu, To Chung Zhang, Shuangquan Zhang, Wei Zhou, Shan-Gui |
| Affiliation | Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China Soongsil Univ, Dept Phys, Seoul 156743, South Korea Soongsil Univ, Origin Matter & Evolut Galaxy OMEG Inst, Seoul 156743, South Korea Pusan Natl Univ, Dept Phys, Busan 46241, South Korea Univ Hong Kong, Dept Phys, Pokfulam, Hong Kong, Peoples R China Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China Beihang Univ, Sch Phys, Beijing 102206, Peoples R China Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China Sungkyunkwan Univ, Dept Energy Sci, Suwon 16419, South Korea Rare Isotope Sci Project, Inst Basic Sci, Daejeon 305811, Korea, Republic Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China Korea Inst Sci & Technol Informat, Daejeon 34141, Korea, Republic Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Peoples R China Anhui Univ, Inst Phys Sci & Informat Technol, Hefei, Peoples R China Rare Isotope Sci Project, Inst Basic Sci, Daejeon 34000, Korea, Republic Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China Sichuan Normal Univ, Ctr Computat Sci, Sch Phys & Elect Engn, Chengdu 610068, Peoples R China Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Peoples R China Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applict, Changsha 410081, Peoples R China |
| Keywords | GROUND-STATE PROPERTIES NUCLEAR-MASS FORMULA MEAN-FIELD APPROACH PROTON DRIP-LINE PSEUDOSPIN SYMMETRY SUPERDEFORMED NUCLEI MAGNETIC-MOMENTS CHARGE RADII NEUTRON HALO SHELL |
| Issue Date | 12-Aug-2020 |
| Publisher | PHYSICAL REVIEW C |
| Abstract | Background: The study of exotic nuclei far from the beta stability line is stimulated by the development of radioactive ion beam facilities worldwide and brings opportunities and challenges to existing nuclear theories. Including self-consistently the nuclear superfluidity, deformation, and continuum effects, the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) has turned out to be successful in describing both stable and exotic nuclei. Due to several challenges, however, the DRHBc theory has only been applied to study light nuclei so far. Purpose: The aim of this work is to develop the DRHBc theory based on the point-coupling density functional and examine its possible application for all even-even nuclei in the nuclear chart by taking Nd isotopes as examples. Method: The nuclear superfluidity is taken into account via Bogoliubov transformation. Densities and potentials are expanded in terms of Legendre polynomials to include the axial deformation degrees of freedom. Sophisticated relativistic Hartree-Bogoliubov equations in coordinate space are solved in a Dirac Woods-Saxon basis to consider the continuum effects. Results: Numerical convergence for energy cutoff, angular momentum cutoff, Legendre expansion, pairing strength, and (un)constrained calculations are confirmed for the DRHBc theory from light nuclei to heavy nuclei. The ground-state properties of even-even Nd isotopes are calculated with the successful density functional PC-PK1 and compared with the spherical nuclear mass table based on the relativistic continuum Hartree-Bogoliubov (RCHB) theory as well as the available data. The calculated binding energies are in very good agreement with the existing experimental values with a rms deviation of 0.958 MeV, which is remarkably smaller than 8.301 MeV in the spherical case. The predicted proton and neutron drip-line nuclei for Nd isotopes are respectively Nd-120 and Nd-214, in contrast with Nd-126 and Nd-228 in the RCHB theory. The experimental quadrupole deformations and charge radii are reproduced well. An interesting decoupling between the oblate shape beta(2) = -0.273 contributed by bound states and the nearly spherical one beta(2) = 0.047 contributed by continuum is found in Nd-214. Contributions of different single-particle states to the total neutron density are investigated and an exotic neutron skin phenomenon is suggested for Nd-214. The proton radioactivity beyond the proton drip line is discussed and Nd-114, Nd-116, and Nd-118 are predicted to be candidates for two-proton or even multiproton radioactivity. Conclusions: The DRHBc theory based on the point-coupling density functional is developed and detailed numerical checks are performed. The techniques to construct the DRHBc mass table for even-even nuclei are explored and extended for all even-even nuclei in the nuclear chart by taking Nd isotopes as examples. The available experimental data are reproduced well. The deformation and continuum effects on drip-line nuclei, exotic neutron skin, and proton radioactivity are presented. |
| URI | http://hdl.handle.net/20.500.11897/591138 |
| ISSN | 0556-2813 |
| DOI | 10.1103/PhysRevC.102.024314 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 核物理与核技术国家重点实验室 |
