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首页> 外文期刊>Physical review, C >Description of shape coexistence in Zr-96 based on the quadrupole-collective Bohr Hamiltonian
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Description of shape coexistence in Zr-96 based on the quadrupole-collective Bohr Hamiltonian

机译：ZR-96的形状共存描述基于四极限集体Bohr Hamiltonian

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摘要

Experimental data on Zr-96 indicate coexisting spherical and deformed structures with small mixing amplitudes. Although a possible geometrical description of such a shape coexistence is implied in the contemporary discussion, it does not exist yet for Zr-96. The observed properties of the low-lying collective states of Zr-96 based on the geometrical collective model are investigated. The quadrupole-collective Bohr Hamiltonian with the potential having two minima, spherical and deformed, is applied. Good agreement with the experimental data on the excitation energies, B(E2), and B(M1) reduced transition probabilities is obtained. It is shown that the low-energy structure of Zr-96 can be described in a satisfactory way within the geometrical collective model with a potential function supporting shape coexistence without other restrictions of its shape. However, the excitation energy of the 2(2)(+) state can be reproduced only if the rotation inertia coefficient is taken to be 5 times smaller than the vibrational one in the region of the deformed well. It is shown also that shell effects are important for the description of B(M1; 2(2)(+) -> 2(1)(+)). An indication of the influence of the pairing vibrational mode on the 0(2)(+) -> 0(1)(+) transition is obtained.
机译：关于ZR-96的实验数据表示具有小混合幅度的共存球形和变形结构。尽管在当代讨论中隐含了这种形状共存的可能的几何描述，但是ZR-96尚不存在。研究了基于几何集体模型的ZR-96的低位集体状态的观察性质。施加了具有两个最小值，球形和变形的电位的四极集集合Bohr Hamiltonian。获得了对励磁能量，B（E2）和B（M1）的实验数据的良好吻合降低了转换概率。结果表明，Zr-96的低能量结构可以在几何集体模型内以令人满意的方式描述具有支撑形状共存的潜在功能，而无需其形状的其他限制。然而，只有在旋转惯量系数被认为是比变形孔区域中的区域小的振动彼此小的5倍，才能再现2（2）（+）状态的激发能量。显示出壳体效应对于B（M1; 2（2）（+） - > 2（+））的描述很重要。获得配对振动模式对0（2）（+） - > 0（1）（+）转变的影响的指示。

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