Breaking of the Neutron Magic Number N=20 in ^<32>Mg and ^<30>Ne and Its Possible Relation to the Cluster Structure
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概要
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The neutron-rich nuclei ^<32>Mg and ^<30>Ne are studied using a new version of antisymmetrized molecular dynamics (AMD). Due to the use of a deformed Gaussian as the single particle wave packet, the description of the deformation properties of Mg isotopes is drastically improved, and l・s force is accounted for more largely and sufficiently. After the angular momentum projection, ^<32>Mg and ^<30>Ne have deformed ground states, and the experimental data for ^<32>Mg are reproduced with reasonable accuracy. The deformation of the mean field is found to be essential to describe these nuclei. The ground states of these nuclei have neutron 2p2h structure. In ^<30>Ne, the cluster-like and the mean-field-like structures coexist. The ground state of ^<32>Mg has a mean-field-like structure. In the vicinity of the ground state, this nucleus is expected to have excited states with cluster-like structure that possesses the neutron 4p4h configuration.
- 理論物理学刊行会の論文
- 2002-01-25
著者
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堀内 昶
Research Center For Nuclear Physics Osaka University:international Institute For Advanced Studies
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KIMURA Masaaki
Department of Mechanical and System Engineering, University of Hyogo
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HORIUCHI Hisashi
Department of Physics, Kyoto University
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KIMURA Masaaki
RI-Beam Science Laboratory, RIKEN (The Institute of Physical and Chemical Research)
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Horiuchi Hisashi
Department Of Physics Kyoto University
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Kimura Masaaki
Department Of Marine Sciences University Of The Ryukyus
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Kimura Masaaki
Department Of Physics Kyoto University
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Kimura Masahiro
Faculty Of Industrial Science And Technology Science University Of Tokyo
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KIMURA Masaaki
Department of Physics, Kyoto University
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KIMURA Masaomi
institute for Cosmic Ray Research, University of Tokyo
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KIMURA Masahiro
Department of Physics, Osaka University
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