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arXiv 1902.00191nucl-th
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反射非对称三轴粒子转子模型中具有八极关联的多个手征双重带

Multiple chiral doublet bands with octupole correlations in reflection-asymmetric triaxial particle rotor model

Y. Y. Wang, S. Q. Zhang, P. W. Zhao, J. Meng

摘要:

建立了一个准质子和准中子与反射非对称三轴转子耦合的反射非对称三轴粒子转子模型(RAT-PRM),并应用于研究$^{78}$ Br中具有八极关联的多手征双峰(MPDMATHABMM D)带.计算的激发能、能量交错参数和$B(M1)/B(E2)$比与正宇称和负宇称的手征双重带的数据是在一个合理的协议。三轴变形$γ$对计算的$B(E1)$的影响是显着的。通过将$γ$从16 $^\circ$变更为21 $^\circ$,$B(E1)$值将得到增强,并与$B(E1)/B(E2)$数据更好地一致。详细讨论了基于转动体、价质子和价中子角动量的手征几何。

英文摘要:

A reflection-asymmetric triaxial particle rotor model (RAT-PRM) with a quasi-proton and a quasi-neutron coupled with a reflection-asymmetric triaxial rotor is developed and applied to investigate the multiple chiral doublet (M$χ$D) bands candidates with octupole correlations in $^{78}$Br. The calculated excited energies, energy staggering parameters, and $B(M1)/B(E2)$ ratios are in a reasonable agreement with the data of the chiral doublet bands with positive- and negative-parity. The influence of the triaxial deformation $γ$ on the calculated $B(E1)$ is found to be significant. By changing $γ$ from 16$^\circ$ to 21$^\circ$, the $B(E1)$ values will be enhanced and better agreement with the $B(E1)/B(E2)$ data is achieved. The chiral geometry based on the angular momenta for the rotor, the valence proton and valence neutron is discussed in details.

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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