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摘要
We study the resonance spectroscopy of the proton-rich nucleus B-7 in the He-4 + p + p + p cluster model. Many-body resonances are treated under the correct boundary condition as Gamow states using the complex scaling method. We predict five resonances of B-7 and evaluate the spectroscopic factors of the Be-6-p components. The importance of the Be-6(2(+))-p component is shown in several states of B-7; this is a common feature of He-7, a mirror nucleus of B-7. For only the ground state of B-7, the mixing of the Be-6(2(+)) state is larger than that of He-6(2(+)) in He-7, which indicates a breaking of mirror symmetry. This is caused by the small energy difference between B-7 and the excited Be-6(2(+)) state, the origin of which is Coulomb repulsion.
- 出版日期2011-12-6
