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arXiv 1012.4311nucl-th
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$^{28}$ Si和$^{32}$ S形变态的团簇形成

Cluster formations in deformed states for $^{28}$Si and $^{32}$S

Takatoshi Ichikawa, Yoshiko Kanada-En'yo, Peter Möller

摘要:

我们使用宏观-微观模型研究了$^{28}$ Si和$^{32}$ S在强形变态下的团簇形成。该研究是基于计算的总能量表面,这是变形依赖的宏观-微观势能面和旋转能量的贡献的总和。我们分析了角动量相关的总能量表面,并确定正常和超变形状态的$^{28}$ Si和$^{32}$ S,分别。我们表明,在足够高的角动量强烈变形极小出现。相应的微观密度分布显示出与$^{16}$ O + $^{12}$ C和$^{16}$ O + $^{16}$ O构型非常相似的簇结构。在更高的变形下,超过最小值,在计算的表面中形成谷。这些谷导致质量分裂,对应于分子共振态已被观察到的目标-抛射体配置。讨论了单体形变极小与二体分子共振态的关系。

英文摘要:

We study cluster formation in strongly deformed states for $^{28}$Si and $^{32}$S using a macroscopic-microscopic model. The study is based on calculated total-energy surfaces, which are the sums of deformation-dependent macroscopic-microscopic potential-energy surfaces and rotational-energy contributions. We analyze the angular-momentum-dependent total-energy surfaces and identify the normal- and super-deformed states in $^{28}$Si and $^{32}$S, respectively. We show that at sufficiently high angular momenta strongly deformed minima appear. The corresponding microscopic density distributions show cluster structure that closely resemble the $^{16}$O+$^{12}$C and $^{16}$O+$^{16}$O configurations. At still higher deformations, beyond the minima, valleys develop in the calculated surfaces. These valleys lead to mass divisions that correspond to the target-projectile configurations for which molecular resonance states have been observed. We discuss the relation between the one-body deformed minima and the two-body molecular-resonance states.

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