ALPHA CLUSTERING AND MONOPOLE STRENGTHS IN LIGHT NUCLEI

被引：1

作者：

Yamada, T. ^{[1
]}

Funaki, Y. ^{[2
]}

Horiuchi, H. ^{[3
]}

Ikeda, K. ^{[2
]}

Tohsaki, A. ^{[3
]}

机构：

[1] Kanto Gakuin Univ, Phys Lab, Yokohama, Kanagawa 2368501, Japan

[2] RIKEN, Inst Phys & Chem Res, Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510098, Japan

[3] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2009年 / 24卷 / 11期

关键词：

Monopole strengths; ground state correlation; alpha-clustering; Bayman-Bohr theorem; COLLECTIVE MOTION; WAVE-FUNCTIONS; SHELL MODEL; STATES; C-12;

D O I：

10.1142/S0217751X09045601

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Strengths of monopole excitation to cluster states are discussed in light nuclei. They are in general so strong to be comparable to the single particle strength and shares an appreciable portion of the sum rule value, in spite of large difference of the structure between the cluster state and the shell-model-like ground state. We point out that the essential reasons of the large strengths are twofold: One is the fact that the clustering degree of freedom is possessed even in simple shell model wave functions (this fact is indicated by Bayman-Bohr theorem), and the other is due to the ground-state correlation induced by the activation of the cluster degree of freedom originally involved in the ground state. They are demonstrated in the case of (16)O as a typical light nucleus. The present results imply that the measurement of strong monopole transitions or excitations is generally very useful for the study of cluster states.

引用

页码：2043 / 2052

页数：10

共 14 条

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