Breaking of the Magic Number N = 20 Studied with the New Version of AMD

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概要

• 論文の詳細を見る

• The neutron-rich nuclei ^32Mg and ^30Ne are studied using a new version of antisymmetrized molecular dynamics (AMD). After the angular-momentum projection, ^32Mg and ^30Ne have largely deformed ground states, and the experimental data for ^32Mg are reproduced with reasonable accuracy. The ground states of these nuclei have neutron 2p2h structure. We also have studied the negative-parity states of these nuclei. Their lowest negative-parity states which have spin-parity 1^- have quite small excitation energies compared to stable N = 20 isotones. By using the Gogny force, their excitation energies have calculated to be 2.4 MeV for ^30Ne and 2.3 MeV for ^32Mg and these 1^- states have neutron 3p3h structure.

• 理論物理学刊行会の論文
• 2002-12-26

著者

• 堀内 昶

  Research Center For Nuclear Physics Osaka University:international Institute For Advanced Studies

• 堀内 昶

  京大・基研

• KIMURA Masaaki

  RI-Beam Science Laboratory, RIKEN (The Institute of Physical and Chemical Research)

• Horiuchi Hisashi

  Department Of Physics Kyoto University

• Kimura Masaaki

  Department Of Marine Sciences University Of The Ryukyus

• Kimura Masaaki

  Department Of Physics Kyoto University

• Kimura Masahiro

  Faculty Of Industrial Science And Technology Science University Of Tokyo

• KIMURA Masaaki

  Department of Physics, Kyoto University

• KIMURA Masaomi

  institute for Cosmic Ray Research, University of Tokyo

• KIMURA Masahiro

  Department of Physics, Osaka University

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