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arXiv 2609.10398nucl-thnucl-ex

γ强度函数随中子数的发展

Development of the γ strength function with the neutron number

  • University of Notre Dame(圣母大学)
  • Helmholtz Zentrum Dresden Rossendorf(德累斯顿罗森多夫亥姆霍兹中心)
  • SP College Srinagar(斯利那加SP学院)
  • Cluster University Srinagar(斯利那加集群大学)

机构由 AI 辅助整理,请以论文原文为准。

Stefan Frauendorf, Ronald Schwengner, Gowhar Bhat, Javid Sheikh

AI总结:

本研究用球壳模型和三轴投影壳模型计算多种同位素系列的γ强度函数,发现M1强度函数普遍增强,并解释LEMAR与剪刀共振源于形变导致的单粒子多重态分裂与碎裂。

AI中文摘要:

使用传统球壳模型(SSM)以及作为新工具的三轴投影壳模型(TPSM),计算了Mo、Fe、Sn、Ge和Gd同位素扩展系列的M1和E2 γ强度函数(γsf)。在几乎所有情况下,都发现了M1 γsf的强烈增强(低能磁辐射-LEMAR)。在壳层中部区域,出现了LEMAR尖峰的双峰结构以及约3 MeV处的凸起,该凸起被解释为剪刀共振(SR)。LEMAR和SR的组合是由形变引起的给定j的球对称单粒子多重态的分裂及其在邻近准粒子构型上的碎裂所产生的。

英文摘要:

The M1 and E2 γ strength functions (γsf) have been calculated for extended series of the Mo, Fe, Sn, Ge and Gd isotopes using the conventional spherical shell model (SSM) and, as a new tool, the triaxial projected shell model (TPSM). For almost all cases the strong enhancement of the M1 γsf (low energy magnetic radiation-LEMAR) is found. In the mid-shell region, a bimodal structure of the LEMAR spike and a bump around 3 MeV, interpreted as the scissors resonance (SR), develops. The combination of LEMAR and the SR is generated by the splitting of the spherical single particle multiplets of given j caused by deformation and their fragmentation over nearby quasiparticle configurations.

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