Abstract
We investigate the tensor correlations in He and Li isotopes systematically. We propose the tensor-optimized shell model (TOSM) to describe the strong tensor correlation arising from the bare nuclear force in nuclei. Using TOSM for Li isotopes, we investigate the anomalous structures of 9,10,11 Li based on the 9 Li +n+n model where the 9 Li cluster is described by TOSM. As a result, the couplings between the tensor correlation in 9 Li and the extra two neutrons emerge Pauli-blocking, which naturally increases the s2 component to develop the halo structure in 11 Li . We further describe the short-range correlation arising from the repulsive core in the bare nuclear force by the unitary correlation operator method (UCOM). We propose the new framework of TOSM+UCOM for the nuclear structure study starting from the bare nuclear force.
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