通过求解加减核子的运动学方程(particle attached or removed equation of motion,PA(R)-EOM),我们将第一性原理Gamow介质相似重整化群理论(ab initio Gamow in-medium similarity renormalization group,G-IMSRG)推广到了闭壳或亚壳...通过求解加减核子的运动学方程(particle attached or removed equation of motion,PA(R)-EOM),我们将第一性原理Gamow介质相似重整化群理论(ab initio Gamow in-medium similarity renormalization group,G-IMSRG)推广到了闭壳或亚壳加减一个核子的开壳原子核计算中,用于描述滴线附近的弱束缚和非束缚开壳原子核.从手征有效场论两体和三体核力NNLO_(sat)出发,我们计算了丰中子氧同位素链的结合能和低激发谱,并与价空间介质相似重整化群理论(valance-space in-medium similarity renormalization group,VS-IMSRG)计算结果和实验数据进行对比,分析了手征三体力和连续态耦合对丰中子氧同位素链滴线和低激发态性质的影响.展开更多
β-decay properties of N=18-22,Z=10-14 nuclei are analyzed with a new shell-model Hamiltonian using the Gogny densitydependent interaction.The Gogny force which has been widely and successfully used in mean-field theo...β-decay properties of N=18-22,Z=10-14 nuclei are analyzed with a new shell-model Hamiltonian using the Gogny densitydependent interaction.The Gogny force which has been widely and successfully used in mean-field theory can provide reasonable two-body matrix elements for cross-shell calculations.The log f t values andβ-decay level schemes are systematically studied using the D1S-Gogny interaction and compared with the SDPF-M results and experimental data.It is shown that the new Hamiltonian provides reliable results forβ-decay along with subtle level schemes for this region.Shell-model calculations with Gogny interaction can lead to a successful description of nuclei in and around the N=20 island of inversion and supplements experiment where sufficient data are not available.展开更多
基金supported by the National Key Basic Research Program of China(Grant No.2013CB834402)the National Natural Science Foundation of China(Grant Nos.11235001,11320101004,and 11575007)the China-U.S.Theory Institute for Physics with Exotic Nuclei(CUSTIPEN)funded by the U.S.Department of Energy,Office of Science(Grant No.DESC0009971)
文摘β-decay properties of N=18-22,Z=10-14 nuclei are analyzed with a new shell-model Hamiltonian using the Gogny densitydependent interaction.The Gogny force which has been widely and successfully used in mean-field theory can provide reasonable two-body matrix elements for cross-shell calculations.The log f t values andβ-decay level schemes are systematically studied using the D1S-Gogny interaction and compared with the SDPF-M results and experimental data.It is shown that the new Hamiltonian provides reliable results forβ-decay along with subtle level schemes for this region.Shell-model calculations with Gogny interaction can lead to a successful description of nuclei in and around the N=20 island of inversion and supplements experiment where sufficient data are not available.
