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arXiv 1610.04899nucl-th
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具有能量相关$γ$ -不稳定类库仑势的玻尔哈密顿量

Bohr Hamiltonian with an energy dependent $γ$-unstable Coulomb-like potential

R. Budaca

摘要:

本文给出了具有能量相关的类库仑$γ$不稳定势的玻尔哈密顿量的精确解析解。由于势的耦合常数与能量的线性相关性,在斜率参数的渐近极限处,相应的谱类似于球振子的谱结构,但具有不同的状态简并度。给出了这种情况下的参数自由能谱和跃迁速率的封闭形式,并与谐波$U(5)$动力学对称性的参数自由能谱和跃迁速率进行了比较。模型波函数被发现表现出的属性,可以与形状共存。一个可能的实验实现的模型中发现,在几个中等的核与一个非常低的第二$0^{+}$状态,已知表现出竞争的扁长形,扁圆形和球形。

英文摘要:

An exact analytical solution for the Bohr Hamiltonian with an energy dependent Coulomb-like $γ$-unstable potential is presented. Due to the linear energy dependence of the potential's coupling constant, the corresponding spectrum in the asymptotic limit of the slope parameter resembles the spectral structure of the spherical vibrator, however with a different state degeneracy. The parameter free energy spectrum as well as the transition rates for this case are given in closed form and duly compared with those of the harmonic $U(5)$ dynamical symmetry. The model wave functions are found to exhibit properties that can be associated to shape coexistence. A possible experimental realization of the model is found in few medium nuclei with a very low second $0^{+}$ state known to exhibit competing prolate, oblate and spherical shapes.

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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