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arXiv 2409.20110nucl-th
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N = 40, 60, 90 区域的核形状/相变

Nuclear shape / phase transitions in the N = 40, 60, 90 regions

Dimitrios Petrellis, Adam Prášek, Petr Alexa, Dennis Bonatsos, Gabriela Thiamová, Petr Veselý

AI总结:

本文通过结构指示量、Skyrme-Hartree-Fock + BCS 微观计算和代数集体模型,研究了 N=40、60、90 区域 Se、Zr、Mo、Nd 同位素中从球形到形变的一阶形状/相变,揭示了势能曲线和等效势的演化特征。

摘要:

我们研究了 N = 40、60 和 90 区域中 Se、Zr、Mo 和 Nd 的同位素,在这些区域可以观察到从球形到形变的一阶形状/相变。通过考察结构指示量,例如某些能量比和 B(E2) 跃迁几率,特别是它们如何随中子数演化,相变行为的迹象变得明显。使用 Skyrme-Hartree-Fock + Bardeen-Cooper-Schrieffer 框架进行的微观平均场计算也揭示了结构变化,即考虑所得势能曲线作为形变函数的演化。最后,使用代数集体模型对 $^{74}$Se、$^{102}$Mo 和 $^{150}$Nd 进行宏观计算,在将其参数拟合到实验能谱后,得到的势与 Bohr 哈密顿量框架中为描述原子核形状跃迁而提出的一些势相似。

英文摘要:

We investigate the isotopes of Se, Zr, Mo and Nd in the regions with N = 40, 60 and 90, where a first-order shape / phase transition, from spherical to deformed, can be observed. The signs of phase transitional behavior become evident by examining structure indicators, such as certain energy ratios and B(E2) transition rates and, in particular, how they evolve with neutron number. Microscopic mean-field calculations using the Skyrme-Hartree-Fock + Bardeen-Cooper-Schrieffer framework also reveal structural changes when considering the evolution of the resulting potential energy curves as functions of deformation. Finally, macroscopic calculations, using the Algebraic Collective Model, specifically for $^{74}$Se, $^{102}$Mo and $^{150}$Nd, after fitting its parameters to experimental spectra, result in potentials that resemble some of the potentials proposed in the framework of the Bohr Hamiltonian to describe shape transitions in nuclei.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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