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arXiv 1101.4547nucl-thnucl-ex
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60 Ni中磁旋转带的新结构

Novel structure for magnetic rotation bands in 60Ni

P. W. Zhao, S. Q. Zhang, J. Peng, H. Z. Liang, P. Ring, J. Meng

摘要:

建立了基于点耦合相互作用的自洽斜轴推转相对论平均场论理论,并应用于60 Ni中新观察到的剪切带的系统研究。倾斜角,变形参数,能谱,和减少M1和$E2$跃迁概率已在一个完全微观和自洽的方式研究了各种配置和转动频率。结果发现,为了再现能谱以及带交叉现象,必须考虑组态之间的竞争和从磁旋转到电旋转的转变。实验测得的电磁跃迁比B(M_1)/B(E_2)的变化趋势与实验数据符合得很好,特别是B(M_1)值随自旋的增加而减小,符合剪切机制的预期。

英文摘要:

The self-consistent tilted axis cranking relativistic mean-field theory based on a point-coupling interaction has been established and applied to investigate systematically the newly observed shears bands in 60Ni. The tilted angles, deformation parameters, energy spectra, and reduced M1 and $E2$ transition probabilities have been studied in a fully microscopic and self-consistent way for various configurations and rotational frequencies. It is found the competition between the configurations and the transitions from the magnetic to the electric rotations have to be considered in order to reproduce the energy spectra as well as the band crossing phenomena. The tendency of the experimental electromagnetic transition ratios B(M1)/B(E2) is in a good agreement with the data, in particular, the B(M1) values decrease with increasing spin as expected for the shears mechanism, whose characteristics are discussed in detail by investigating the various contributions to the total angular momentum as well.

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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