Multifragmentation and a Liquid-Gas Transition of a Nuclear System Studied with AMD-MF and Gogny Effective Interaction

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概要

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• Multifragmentation and a liquid-gas phase transition of a nuclear system are studied using AMD-MF (antisymmetrized molecular dynamics with momentum fluctuation). An accurate calculation of the Gogny interaction is made, and a good reproduction of isotopic binding energied is obtained. Though the system is small (A=36), the multifragmentation system seems to exhibit liquie-like, mixed and gas-like configurations and a transition from a cold liquid-like phase to a gas phase is strongly dependent on the system radius, i.e. the density of the system. Unlike the calculation with the Volkov force, a clear indication of the decrease of temperature at the end of the liquid phese is not seen. Changes in the fragmentation channel as a function of the excitation energy exhibit good agreement with the result of the statistical model. The caloric curve of each cluster possesses a Fermi gas-like liquid phase that is followed by a constant temperature and a sharp increase of nuclear radii.

• 理論物理学刊行会の論文
• 2001-01-25

著者

• 堀内 昶

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

• SUGAWA Yoshio

  Physics Department, Kyoto University

• HORIUCHI Hisashi

  Phosics Department, Kyoto University

• Sugawa Yoshio

  Physics Department Kyoto University

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