Effects ofΛΛω−tensor coupling on the spin symmetry ofΛspectra inΛ−nucleus systems are studied using relativistic mean-field theory.Taking 12C+Λas an example,it is found that the tensor coupling enlarges the spin...Effects ofΛΛω−tensor coupling on the spin symmetry ofΛspectra inΛ−nucleus systems are studied using relativistic mean-field theory.Taking 12C+Λas an example,it is found that the tensor coupling enlarges the spin−orbit splittings ofΛby a factor of 5 but has a negligible effect on the wave functions ofΛ.Similar conclusions are observed in otherΛ−nuclei,including ^(16)O+Λ,^(40)Ca+Λand ^(208)Pb+Λ.It is indicated that the spin symmetry in anti-lambda-nucleus systems is still a good approximation irrespective of the tensor coupling.展开更多
We report on a very recently developed three-dimensional angular momentum projected relativistic mean-field theory with point-coupling interaction (3DAMP+RMF-PC). Using this approach the same effective nucleon-nucleon...We report on a very recently developed three-dimensional angular momentum projected relativistic mean-field theory with point-coupling interaction (3DAMP+RMF-PC). Using this approach the same effective nucleon-nucleon interaction is adopted to describe both the single-particle and collective motions in nuclei. Collective states with good quantum angular momentum are built projecting out the intrinsic deformed meanfield states. Results for 24Mg are shown as an illustrative application.展开更多
The neutrinoless double beta(0vββ)decay is a hypothetical weak process which manifests itself in the“low-energy”environment of atomic nuclei as two neutrons in a parent nucleus(A,Z)decays into two protons in a dau...The neutrinoless double beta(0vββ)decay is a hypothetical weak process which manifests itself in the“low-energy”environment of atomic nuclei as two neutrons in a parent nucleus(A,Z)decays into two protons in a daughter nucleus(A,Z+2)with the emission of two electrons but no(anti)neutrinos[1].展开更多
Deformation constrained relativistic mean-field (RMF) approach with fixed configuration and timeodd component has been developed and applied to investigate magnetic moments of light nuclei near doublyclosed shells. Ta...Deformation constrained relativistic mean-field (RMF) approach with fixed configuration and timeodd component has been developed and applied to investigate magnetic moments of light nuclei near doublyclosed shells. Taking 17O as an example, the results and discussion are given in detail.展开更多
Single-particle resonance states of 122Zr are studied in the real stabilization method within the framework of relativistic mean field theory. Two effcient methods are adopted to extract the resonance energy and width...Single-particle resonance states of 122Zr are studied in the real stabilization method within the framework of relativistic mean field theory. Two effcient methods are adopted to extract the resonance energy and width of 122Zr. The results are compared with those obtained from the analytic continuation in the coupling approach and scattering phase-shift methods.展开更多
Excited states of the positive-parity intruder band in 118Sn have been studied via the 116Cd(7Li, 1p4n) reaction at 7Li energy of 48 MeV using techniques of in-beam γ-ray spectroscopy. This intruder band has been obs...Excited states of the positive-parity intruder band in 118Sn have been studied via the 116Cd(7Li, 1p4n) reaction at 7Li energy of 48 MeV using techniques of in-beam γ-ray spectroscopy. This intruder band has been observed up to 7187 keV with spin (16+). The structural evolution of this intruder band with increasing angular momentum has been discussed in terms of the aligned angular momentum and the ratio of the E-Gamma Over Spin (E-GOS) curve.展开更多
The polarization effect on the spin symmetry for anti-Lambda spectrum in 16 O+Λ system has been studied in relativistic mean-field theory.The PK1 effective interaction is used for nucleon-meson couplings and G-parity...The polarization effect on the spin symmetry for anti-Lambda spectrum in 16 O+Λ system has been studied in relativistic mean-field theory.The PK1 effective interaction is used for nucleon-meson couplings and G-parity symmetry with a reduction factor ξ = 0.3 is adopted for anti-Lambda-meson couplings.The energy differences between spin doublets in the anti-Lambda spectrum are around 0.10-0.73 MeV for p Λ state.The dominant components of the Dirac spinor for the anti-Lambda spin doublets are found to be near identical.It indicates that the spin symmetry is still well-conserved against the polarization effect from the valence antiLambda hyperon,which leads to a highly compressed cold nucleus with the central density up to 2 - 3 times of saturated density.展开更多
New parameter sets for Λ-nucleon coupling in relativistic mean field theory are proposed based on nucleon-nucleon effective interaction PK1. Hypernuclear properties are described well through a systematical study. Ef...New parameter sets for Λ-nucleon coupling in relativistic mean field theory are proposed based on nucleon-nucleon effective interaction PK1. Hypernuclear properties are described well through a systematical study. Effects of hyperon tensor coupling term on spin-orbit splitting are also investigated self-consistently.展开更多
基金Supported by the Asia-Europe Link Project [CN/ASIA-LINK/008 （094-791）] of the European Commission, the National Natural Science Foundation of China Under Grant Nos 10775004, 10221003, 10720003 and 10705004, the Bundesministerium fiir Bildung und Forschung, Germany under Project 06 MT 246 and by the DFG cluster of excellence ＂Origin and Structure of the Universe＂ （www. universe-clust er.de）.
基金Supported by the National Basic Research Programme of China under Grant No 2007CB815000, the National Natural Science Foundation of China under Grant Nos 10435010, 10775004 and 10221003, the National Research Foundation of South Africa under Grant No 2054166, and the Scientific Research Foundation of Chinese Agriculture University under Grant No 2007005.
文摘在 C-13 (Lambda ) 在磁性的时刻联合的核心极化和张肌的效果， O-17 (Lambda ) ，和 Ca-41 (Lambda ) Lambda-hypernuclei 被与数量，向量和张肌潜力采用迪拉克方程学习。在磁性的时刻的核心极化的效果被联合的张肌压制，这被发现。p (Lambda ) 切开的纺纱轨道更加说的 A 张肌潜力还原剂。然而，几乎，一样的磁性的时刻用与或没有 A 经由迪拉克方程获得的重核子波浪功能被获得在电磁的当前的顶点的张肌潜力。为从 Schmidt 价值的状态被发现与原子质量增加的 p (Lambda ) 的磁性的时刻的偏差数。
基金Supported partially by the National Natural Science Foundation of China under Grant Nos 10947013, 10475098 and 10205019, the Knowledge Innovation Project of Chinese Academy of Sciences under Grant No KJCX2-YW-N44, Open Research Program at Large Scale Facility of Chinese Academy of Sciences （O903010YKF）, and the SWU Initial Research Foundation under Grant to Doctor （SWU109011）.
基金Supported by the National Key Basic Research Program of China under Grant No 2007CB815000, the National Natural Science Foundation of China under Grant No 10775004, the Southwest University Initial Research Foundation Grant to Doctor （No SWU109011）.
基金＊Supported by the National Natural Science Foundation of China under Grant Nos 10705004, 10775004 and 10947013, the National Basic Research Program of China under Grant No 2007CB815000, and the SWU Initial Research Foundation Grant to Doctor （SWU109011）.
基金by the National Basic Research Program of China under Grant No 2007CB815000the National Natural Science Foundation of China under Grant Nos 11005004,10947013,and 10975008+2 种基金the State Key Laboratory of Software Development Environment under Grant No SKLSDE-2011ZX-18the Southwest University Initial Research Foundation Grant to Doctor(No SWU109011)the Fundamental Research Funds for the Central Universities under Grant No XDJK2010B007.
文摘Effects ofΛΛω−tensor coupling on the spin symmetry ofΛspectra inΛ−nucleus systems are studied using relativistic mean-field theory.Taking 12C+Λas an example,it is found that the tensor coupling enlarges the spin−orbit splittings ofΛby a factor of 5 but has a negligible effect on the wave functions ofΛ.Similar conclusions are observed in otherΛ−nuclei,including ^(16)O+Λ,^(40)Ca+Λand ^(208)Pb+Λ.It is indicated that the spin symmetry in anti-lambda-nucleus systems is still a good approximation irrespective of the tensor coupling.
基金Supported by Asia-Europe Link Project [CN/ASIA-LINK/008 (094-791)] of European CommissionNational Natural Science Foundation of China (10435010, 10575083, 10605001, 10221003), DFG Cluster of Excellence "Origin and Structure of the Universe"(www.universe-cluster.de)
文摘We report on a very recently developed three-dimensional angular momentum projected relativistic mean-field theory with point-coupling interaction (3DAMP+RMF-PC). Using this approach the same effective nucleon-nucleon interaction is adopted to describe both the single-particle and collective motions in nuclei. Collective states with good quantum angular momentum are built projecting out the intrinsic deformed meanfield states. Results for 24Mg are shown as an illustrative application.
基金supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Awards No. DE-SC0017887, No. DE-FG02-97ER41019, No. DE-SC0015376 (the DBD Topical Theory Collaboration) and No. DE-SC0018083 (NUCLEI SciDAC-4 Collaboration)
文摘The neutrinoless double beta(0vββ)decay is a hypothetical weak process which manifests itself in the“low-energy”environment of atomic nuclei as two neutrons in a parent nucleus(A,Z)decays into two protons in a daughter nucleus(A,Z+2)with the emission of two electrons but no(anti)neutrinos[1].
基金Supported by National Natural Science Foundation of China (10505002, 10435010, 10605001, 10221003)Postdoctoral Science Foundation of China (20060390371)
文摘Deformation constrained relativistic mean-field (RMF) approach with fixed configuration and timeodd component has been developed and applied to investigate magnetic moments of light nuclei near doublyclosed shells. Taking 17O as an example, the results and discussion are given in detail.
基金We acknowledge S. Goriely, B. Sun, and P. W. Zhao for stimulating discussions. This work was supported in part by the National Undergraduate Training Programs for Innovation and Entrepreneurship （Project No. 201210635132）, the National Basic Research Program of China （973 Program） （Grant No. 2013CB834400）, the National Natural Science Foundation of China （Grant Nos. 10975008, 10947013, 11175002, 11105110, 11105111, and 11205004）, the Research Fund for the Doctoral Program of Higher Education （Grant No. 20110001110087）, the Natural Science Foundation of Chongqing （Grant No. cstc2011jjA0376）, and the Fundamental Research Funds for the Central Universities （Grant Nos. XDJK2010B007 and XDJK2011B002）.
基金Supported by National Natural Science Foundation of China (10435010, 10575083, 10475033, 10221003)
文摘Single-particle resonance states of 122Zr are studied in the real stabilization method within the framework of relativistic mean field theory. Two effcient methods are adopted to extract the resonance energy and width of 122Zr. The results are compared with those obtained from the analytic continuation in the coupling approach and scattering phase-shift methods.
基金Supported by National Natural Science Foundation of China (10875074, 10605001, 10505002, 10775005)Major StateBasic Research Developing Program (2007CB815005)
文摘Excited states of the positive-parity intruder band in 118Sn have been studied via the 116Cd(7Li, 1p4n) reaction at 7Li energy of 48 MeV using techniques of in-beam γ-ray spectroscopy. This intruder band has been observed up to 7187 keV with spin (16+). The structural evolution of this intruder band with increasing angular momentum has been discussed in terms of the aligned angular momentum and the ratio of the E-Gamma Over Spin (E-GOS) curve.
基金Supported by National Key Basic Research Programme of China (2007CB815000)National Natural Science Foundation of China (10947013,10975008,10775004)Southwest University Initial Research Foundation Grant to Doctor (No.SWU109011)
文摘The polarization effect on the spin symmetry for anti-Lambda spectrum in 16 O+Λ system has been studied in relativistic mean-field theory.The PK1 effective interaction is used for nucleon-meson couplings and G-parity symmetry with a reduction factor ξ = 0.3 is adopted for anti-Lambda-meson couplings.The energy differences between spin doublets in the anti-Lambda spectrum are around 0.10-0.73 MeV for p Λ state.The dominant components of the Dirac spinor for the anti-Lambda spin doublets are found to be near identical.It indicates that the spin symmetry is still well-conserved against the polarization effect from the valence antiLambda hyperon,which leads to a highly compressed cold nucleus with the central density up to 2 - 3 times of saturated density.
基金Supported by Scientific Research Foundation of China Agriculture University (2007005)
文摘New parameter sets for Λ-nucleon coupling in relativistic mean field theory are proposed based on nucleon-nucleon effective interaction PK1. Hypernuclear properties are described well through a systematical study. Effects of hyperon tensor coupling term on spin-orbit splitting are also investigated self-consistently.
