Resonances of 7He in the complex scaling method

Details Resonances of 7He in the complex scaling method Resonances of 7He in the complex scaling method

2007-10-16

arxiv.org/abs/0710.2945v1

Phys.Rev.C76:054309,2007

Physics

Nuclear Physics

Nuclear Theory

7 pages, 4 figures

Scientific paper

10.1103/PhysRevC.76.054309

We study the resonance spectroscopy of 7He in the 4He+n+n+n cluster model, where the motion of valence neutrons is described in the cluster orbital shell model. Many-body resonances are treated on the correct boundary condition as the Gamow states in the complex scaling method. We obtain five resonances and investigate their properties from the configurations. In particular, the 1/2- state is found in a low excitation energy of 1.1 MeV with a width of 2.2 MeV, while the experimental determination of the position of this state is not so clear. We also evaluate the spectroscopic factors of the 6He-n components in the obtained 7He resonances. The importance of the 6He(2+) state is shown in several states of 7He.

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