arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.4495nucl-th
收藏

$^{40}$ Ar中的三轴超形变

Triaxial superdeformation in $^{40}$Ar

Yasutaka Taniguchi, Yoshiko Kanada-En'yo, Masaaki Kimura, Kiyomi Ikeda, Hisashi Horiuchi, Eiji Ideguchi

摘要:

用变形基反对称分子动力学方法研究了$^{40}$ Ar的超形变态.低能态的计算采用宇称角动量投影(AMP)和生成坐标法(GCM)。波函数通过能量变化与四极形变参数$β$的约束得到,而其他量,如三轴度$γ$通过能量变化进行优化。通过GCM计算,在基态(GS)带的正上方得到了一个SD带。由于三轴性,SD频带涉及$K^π= 2^+$边带。计算的SD带电四极跃迁强度与实验值吻合较好。三轴性对于理解低激发态具有重要意义。

英文摘要:

Superdeformed (SD) states in $^{40}$Ar have been studied using the deformed-basis antisymmetrized molecular dynamics. Low energy states were calculated by the parity and angular momentum projection (AMP) and the generator coordinate method (GCM). Basis wave functions were obtained by the energy variation with a constraint on the quadrupole deformation parameter $β$, while other quantities such as triaxiality $γ$ were optimized by the energy variation. By the GCM calculation, an SD band was obtained just above the ground state (GS) band. The SD band involves a $K^π= 2^+$ side band due to the triaxiality. The calculated electric quadrupole transition strengths of the SD band reproduce the experimental values appropriately. Triaxiality is significant for understanding low-lying states.

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。

↑