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质子-中子相互作用与壳模型配对近似
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作者 傅冠健 赵玉民 《核技术》 CAS CSCD 北大核心 2014年第10期8-11,共4页
质子-中子相互作用和质子-中子配对是原子核结构中有趣的问题。本文指出,经验上由结合能提取的质子-中子相互作用和壳模型计算得到的T=0质子-中子相互作用的计算结果很接近;计算中奇奇核和偶偶核的结合能应该附加一个额外项,这个额外项... 质子-中子相互作用和质子-中子配对是原子核结构中有趣的问题。本文指出,经验上由结合能提取的质子-中子相互作用和壳模型计算得到的T=0质子-中子相互作用的计算结果很接近;计算中奇奇核和偶偶核的结合能应该附加一个额外项,这个额外项由质子-中子相互作用给出。自旋平行的质子-中子配对(角动量为9,同位旋为0)在96Cd的01+、21+、41+、61+、121+、141+和161+态以及92Pd原子核的01+和21+态中重要,而传统的SD配对近似对于01+和21+态的描述更合适。 展开更多
关键词 质子-中子相互作用 T=0质子-中子配对 配对近似
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原子核集体转动行为的壳模型配对理论研究进展
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作者 雷杨 路毅 +1 位作者 傅冠健 覃珍珍 《科学通报》 EI CAS CSCD 北大核心 2024年第25期3757-3769,共13页
近十年来,从原子核壳模型理论框架出发对重核区原子核集体转动的研究已成为核结构领域的前沿课题.尽管现代计算技术不断拓展大规模壳模型的应用范围,但在处理重核区转动原子核时,壳模型组态空间维数仍远超人类现有的计算能力.核子配对... 近十年来,从原子核壳模型理论框架出发对重核区原子核集体转动的研究已成为核结构领域的前沿课题.尽管现代计算技术不断拓展大规模壳模型的应用范围,但在处理重核区转动原子核时,壳模型组态空间维数仍远超人类现有的计算能力.核子配对截断作为一种有效的组态空间截断方案,在壳模型研究中得到了广泛应用.以往发展的多种壳模型配对理论成功描述了近球形和过渡区原子核的低激发态性质,然而在转动核问题上面临挑战.本文概述了近年来发展的两种壳模型配对理论框架,分析了SU(3)转动极限情况下多核子系统的核子配对机制,探讨了壳模型配对理论对原子核形状共存、形状演化以及转动带回弯现象的理论解释.这些新方法为壳模型在重核区转动核研究提供了新的机遇和物理图像,有助于人们更深入地理解原子核的复杂结构和行为. 展开更多
关键词 集体转动 原子核壳模型 配对理论 形状共存 形状演化 回弯
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Investigating the level structure of ^(206)Rn:evolution from seniority regime to collective dynamics
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作者 Rui Guo Li-Hua Zhu +10 位作者 Jing-Bin Lu Guan-Jian Fu Meng Wang Bao-Hua Sun Gao-Long Zhang Zhen Ren Yi-Heng Wu Yun Zheng Chuang-Ye He Jin-Long Wang Xiao-Guang Wuand Shun-He Yao 《Chinese Physics C》 SCIE CAS CSCD 2024年第11期75-85,共11页
Excited states of ^(206)Rn have been examined via the 197 Au(^(14)N,5n)^(206)Rn fusion reaction at a beam energy of 78 MeV.A number of transitions and levels are identified by the γ-γ coincidence measurement,further... Excited states of ^(206)Rn have been examined via the 197 Au(^(14)N,5n)^(206)Rn fusion reaction at a beam energy of 78 MeV.A number of transitions and levels are identified by the γ-γ coincidence measurement,further enriching the level scheme of ^(206)Rn.The fullconfiguration shell model and nucleon-pair approximation(NPA)were utilized to investigate the single-particle configurations and seniority structures in ^(206)Rn.The results of these two calculations suggest that 2_(1)^(+) and 4_(1)^(+) states exhibit only a 50%component of a seniority-two state associated with a broken neutron pair.The collectivity of these two states primarily arises from configuration mixing due to residual proton-neutron interactions.Furthermore,6_(1)^(+) and 8_(1)^(+) states are predominantly characterized by a seniority-two state marked by a broken proton pair. 展开更多
关键词 γ-γcoincidence measurement levels shell model nucleon-pair approximation SENIORITY COLLECTIVITY
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Systematics of 2_(1)^(+)States in N=82 Even-even Isotones
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作者 CHEN Qingyun YU Yixin +2 位作者 GUO Shaotang FU Guanjian REN Zhongzhou 《原子核物理评论》 CAS 2024年第2期606-610,共5页
In this paper,we study the systematics of the 2_(1)^(+)states in the N=82 even-even isotones with proton numbers between 52 and 72.We calculate the level energies of the 0_(1)^(+),2_(1)^(+)states and the electric quad... In this paper,we study the systematics of the 2_(1)^(+)states in the N=82 even-even isotones with proton numbers between 52 and 72.We calculate the level energies of the 0_(1)^(+),2_(1)^(+)states and the electric quadrupole reduced transition probabilities B(E2;2_(1)^(+)→0_(1)^(+)),in the framework of the nuclear shell model with a monopole-and multipole-optimized realistic interaction.Our calculations yield good agreement with the experimental data and show a 2.5 MeV gap at Z=64 subshell closure in^(146)Gd.We predict that the B(E2;2_(1)^(+)→0_(1)^(+))value for^(146)Gd is close to those for^(142)Nd and^(144)Sm,and the values increase rapidly from^(148)Dy to^(152)Yb. 展开更多
关键词 shell model N=82 isotones 2_(1)^(+)state energy electric quadrupole reduced transition probability
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Low-lying states of 92,93Nb excited in the reactions induced by the weakly-bound nucleus 6Li near the Coulomb barrier
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作者 Yi-Feng Lv Jing-Bin Lu +13 位作者 Gao-Long Zhang Yi-Heng Wu Cen-Xi Yuan Guan-Jian Fu Guang-Xin Zhang Zhen Huang Ming-Li Wang Shi-Peng Hu Hui-Bin Sun Huan-Qiao Zhang Cheng-Qian Li Ke-Yan Ma Ying-Jun Ma Yun-Zuo Liu 《Chinese Physics C》 SCIE CAS CSCD 2019年第10期69-77,共9页
Excited states of odd-odd nucleus 92Nb and odd-A nucleus 93Nb were populated in the 6 Li+ 89 Y reaction with an incident energy of 34 MeV. The processes that produce 92,93Nb and can be measured by a combination of lig... Excited states of odd-odd nucleus 92Nb and odd-A nucleus 93Nb were populated in the 6 Li+ 89 Y reaction with an incident energy of 34 MeV. The processes that produce 92,93Nb and can be measured by a combination of light charged particle and gamma ray measurements are discussed. Twenty new transitions are observed and eight new levels are constructed in 92Nb, and in addition two new transitions are added to the level scheme of 93Nb. Using shell2 model calculations, the low-lying structure of 9 Nb is investigated and compared with the experimental results. 展开更多
关键词 weakly-bound projectile COINCIDENCE measurement level structure ODD-ODD NUCLEUS 92Nb odd-A NUCLEUS 93Nb.
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Isospin dependence of the nuclear binding energy
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作者 Y.Q.He J.K.Ge +1 位作者 G.J.Fu H.Jiang 《Chinese Physics C》 SCIE CAS CSCD 2021年第1期272-279,共8页
In this paper,we study the symmetry energy and the Wigner energy in the binding energy formula for atomic nuclei.We simultaneously extract the I2 symmetry energy and Wigner energy coefficients using the double differe... In this paper,we study the symmetry energy and the Wigner energy in the binding energy formula for atomic nuclei.We simultaneously extract the I2 symmetry energy and Wigner energy coefficients using the double difference of "experimental" symmetry-Wigner energies,based on the binding energy data of nuclei with A≥16.Our study of the triple difference formula and the "experimental" symmetry-Wigner energy suggests that the macroscopic isospin dependence of binding energies is explained well by the I2 symmetry energy and the Wigner energy,and further consideration of the I4 term in the binding energy formula does not substantially improve the calculation result. 展开更多
关键词 symmetry energy i^4 term Wigner energy nuclear binding energy
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基于壳模型对力加四极力研究sd和pf壳偶偶原子核
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作者 贺冶秋 傅冠健 《原子核物理评论》 CAS CSCD 北大核心 2020年第3期509-515,共7页
本文在原子核壳模型框架下基于唯象相互作用(对力加四极力)研究sd壳和pf壳的偶偶核低激发集体态。在提取了USDB和GXPF1相互作用的单粒子能量和单极相互作用的基础上,我们用一套统一参数计算重现了球形核和形变核的低激发谱;将对相互作... 本文在原子核壳模型框架下基于唯象相互作用(对力加四极力)研究sd壳和pf壳的偶偶核低激发集体态。在提取了USDB和GXPF1相互作用的单粒子能量和单极相互作用的基础上,我们用一套统一参数计算重现了球形核和形变核的低激发谱;将对相互作用中的单极成分扣除后可以得到较好的结合能计算结果。同位旋标量的对相互作用对计算结果影响不大。单极相互作用在经验质子—中子相互作用、原子核对称能和Wigner能中产生重要贡献。 展开更多
关键词 壳模型 对力加四极力 统一参数 单极成分
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