par Dufour, Marianne;Descouvemont, Pierre
Référence Physics letters. Section B, 696, 3, page (237-240)
Publication Publié, 2011-01
Article révisé par les pairs
Résumé : We investigate the 16B spectrum within a microscopic 15B + n model, involving several channels. The wave functions are defined in the Generator Coordinate Method, associated with the microscopic R-matrix formalism. We suggest that the narrow peak observed in recent experiments above the 15B + n threshold can be assigned to a 0- resonance which decays by d-wave neutron emission. The GCM calculation shows that this state cannot be reproduced in a single-channel B15(3/2-)+n model, and that excited configurations are necessary. Other 1- and 2- s-wave resonances are found at low excitation energies. In particular, we find a 1- state which represents a possible candidate for the 16B ground state. In general, our results show the importance of a multichannel framework. Comparisons with shell-model calculations are briefly discussed. © 2010 Elsevier B.V.