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Simultaneous study of the 11Li and 10Li nuclei in a microscopic cluster model

par Descouvemont, Pierre
Référence Nuclear physics. A, 626, 3, page (647-668)
Publication Publié, 1997

Article révisé par les pairs

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Résumé :

The 11Li and 10Li nuclei are investigated in the Generator Coordinate Method involving 9Li+n+n and 9Li+n cluster configurations, respectively. The 9Li nucleus is described in the shell model with all p-shell wave functions allowed by the Pauli principle. This procedure yields many 9Li states, defined by a flexible mixing of shell model basis states. Two different nucleon-nucleon interactions are used. We compute some spectroscopic properties of 11Li, such as radii, quadrupole moments and densities. The model predicts a l/2- excited state, but no positive-parity state. With the same conditions of calculation, we study the 10Li system. We find a 1+ assignment for the ground state. We present the s phase shifts, and discuss the possible existence of a low-energy virtual s state. The properties of such a state are shown to be partly model dependent. © 1997 Elsevier Science B.V.