Lambda-Sigma coupling effect in the neutron-rich Lambda hypernucleus Li-10(Lambda) in a microscopic shell-model calculation

作者：Umeya A^*; Harada T

来源：Physical Review C, 2009, 79(2): 024315.

DOI：10.1103/PhysRevC.79.024315

We investigate the structure of the neutron-rich Lambda-hypernucleus Li-10(Lambda) by using microscopic shell-model calculations considering a Lambda-Sigma coupling effect. The calculated Sigma-mixing probability in the Li-10(Lambda) ground state is found to be about 0.34% that is coherently enhanced by the Lambda-Sigma coupling configurations, leading to the energy shift 0.28 MeVthat is about 3 times larger than that in Li-7(Lambda). The importance of the Sigma configuration obtained by the Sigma N interaction and the potentiality of the neutron-rich environment are discussed.

• 出版日期2009-2