11Li beta decay into 9Li and deuteron within a three-body model

Details 11Li beta decay into 9Li and deuteron within a three-body model 11Li beta decay into 9Li and deuteron within a three-body model

2006-12-17

arxiv.org/abs/nucl-th/0612075v1

Phys.Rev.C74:064302,2006

Physics

Nuclear Physics

Nuclear Theory

14 pages, 7 figures, 3 tables

Scientific paper

10.1103/PhysRevC.74.064302

The beta decay process of the 11Li halo nucleus into 9Li and d is studied in a three-body model. The 11Li nucleus is described as a 9Li+n+n system in hyperspherical coordinates on a Lagrange mesh. Various 9Li+d potentials are compared involving a forbidden state, a physical bound state, and a resonance near 0.25 MeV in the s-wave. With an added surface absorption, they are compatible with elastic scattering data. The transition probability per time unit is quite sensitive to the location of the resonance. For a fixed resonance location, it does not depend much on the potential choice at variance with the 6He delayed deuteron decay. The calculated transition probability per time unit is larger than the experimental value but the difference can be explained by a slightly higher resonance location and/or by absorption from the 9Li+d final channel.

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