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arXiv 0907.0517nucl-th
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$^{28}$ Si中的团簇结构和超形变

Cluster structures and superdeformation in $^{28}$Si

Yasutaka Taniguchi, Yoshiko Kanada-En'yo, Masaaki Kimura

摘要:

本文采用反对称分子动力学(AMD)和约束变分多组态混合(MCM)方法研究了$^{28}$ Si的正宇称态。通过对变分计算中的团簇距离和四极形变进行约束,得到了具有$α$ - $^{24}$ Mg和$^{12}$ C- $^{16}$ O团簇结构以及形变结构的基波函数。叠加这些基波函数,我们得到了一个扁长基态带,一个$β$振动带,一个正常变形的扁长带,和一个超变形带。发现正常形变带和超形变带分别含有大量的$^{12}$ C- $^{16}$ O和$α$ - $^{24}$ Mg团簇组分。研究结果还表明,在$α$ - $^{24}$ Mg团簇结构中存在两个激发带,其中团簇间运动和$^{24}$ Mg团簇形变起重要作用.

英文摘要:

We have studied positive-parity states of $^{28}$Si using antisymmetrized molecular dynamics (AMD) and multi-configuration mixing (MCM) with constrained variation. Applying constraints to the cluster distance and the quadrupole deformation of the variational calculation, we have obtained basis wave functions that have various structures such as $α$-$^{24}$Mg and $^{12}$C-$^{16}$O cluster structures as well as deformed structures. Superposing those basis wave functions, we have obtained a oblate ground state band, a $β$ vibration band, a normal-deformed prolate band, and a superdeformed band. It is found that the normal-deformed and superdeformed bands contain large amounts of the $^{12}$C-$^{16}$O and $α$-$^{24}$Mg cluster components, respectively. The results also suggest the presence of two excited bands with the developed $α$-$^{24}$Mg cluster structure, where the inter-cluster motion and the $^{24}$Mg-cluster deformation play important roles.

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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