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arXiv · 0706.2911

Roles of the tensor and pairing correlations on the halo formation in 11Li

Takayuki Myo·Kiyoshi Kato·Hiroshi Toki·Kiyomi Ikeda
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Abstract

We study the roles of the tensor and pairing correlations on the halo formation in 11Li with an extended 9Li+n+n model. We first solve the ground state of 9Li in the shell model basis by taking 2p-2h states using the Gaussian functions with variational size parameters to take into account the tensor correlation fully. In 11Li, the tensor and pairing correlations in 9Li are Pauli-blocked by additional two neutrons, which work coherently to make the configurations containing the 0p1/2 state pushed up and close to those containing the 1s1/2 state. Hence, the pairing interaction works efficiently to mix the two configurations by equal amount and develop the halo structure in 11Li. For 10Li, the inversion phenomenon of s- and p-states is reproduced in the same framework. Our model furthermore explains the recently observed Coulomb breakup strength and charge radius for 11Li.

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Takayuki Myo, Kiyoshi Kato, Hiroshi Toki, Kiyomi Ikeda. 2007-06-20. Roles of the tensor and pairing correlations on the halo formation in 11Li. https://doi.org/10.1103/physrevc.76.024305

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