Realistic Structure of the T=1 Negative Parity States in the ^4He Nucleus

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概要

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• The T=1 excited states of ^4He are investigated by the use of the Hamada-Johnston and the Tamagaki potential in a framework of the ATMS method. Total energies of the states evaluated in terms of realistic wave functions are found to reproduce the T=1 observed spectrum reasonably well with no adjustable parameter. The lower 1^- level appears properly below 0^- level. The 1p-1h model seems difficult to describe this behaviour. The role of the triplet-even tensor force remains important still in the excited states as well as in the ground state. The binding mechanism in the excited state seems different from that in the ground state due to the existence of the p-orbit nucleon, which suggests a p-^3H or n-^3He cluster-like structure in the excited states of ^4He. The splitting among the T=1 states is attributed mainly to the triplet-odd non-central forces, but magnitude of their matrix elements is considerably reduced by a factor ∼1/3 in comparison with those of the 1p-1h model. These features indicate the importance of taking the realistic structure of the system of nucleons into account.

• 理論物理学刊行会の論文
• 1980-01-25

著者

• Sakai Motoki

  Department Of Physics Hokkaido University

関連論文

• Chapter VII Negative-Parity States of the Alpha Particle
• Chapter III Binding Energy of the Alpha Particle
• Chapter II The ATMS Method and the Three-Nucleon System with Realistic Potentials
• Variational Calculations of the Alpha Particle with Realistic Nucleon-Nucleon Potentials
• A New Variational Method and Binding Energy of the Triton with Realistic Potentials
• Realistic Structure of the T=1 Negative Parity States in the ^4He Nucleus

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