8Li+alpha decay of 12B and its possible astrophysical implications

N. Soic, S. Cherubini, M. Lattuada, DJ. Miljanic, S. Romano, C. Spitaleri, M. Zadro

Submitted on 18 June 2003


The 12B excitation energy spectrum has been obtained from coincidence measurements of the 9Be+7Li -> 2alpha+8Li reaction at E{0}=52 MeV. The decay of the states at excitations between 10 and 16 Mev into alpha$+8Li has been observed for the first time. Observed alpha-decay indicates possible cluster structure of the 12B excited states. The influence of these states on the cross section of the astrophysically important 8Li(alpha,n)11B and 9Be+t reactions is discussed and the results are compared with existing results.


Comment: accepted for publication in Europhysics Letters

Subjects: Nuclear Experiment; Astrophysics