Study of beta-delayed 3-body and 5-body breakup channels from the decay of 11Li

M. Madurga , M.J.G. Borge , J.C. Angélique (1) , L. Bao , U. Bergmann , A. Butua , J. Cederkäll , C.Aa. Diget , L.M. Fraile , H.U.O. Fynbo , H.B. Jeppesen , B. Jonson , F. Maréchal , F.M. Marqués (1) , T. Nilsson , G. Nyman , F. Perrot (2) , K. Riisager , O. Tengblad , E. Tengborn , M. Turrion , K. Wilhelmsen

1 LPCC - Laboratoire de physique corpusculaire de Caen
2 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

The beta-delayed charged particle emission from 11Li has been studied with emphasis on the three-body n+alpha+6He and five-body 2alpha+3n channels from the 10.59 and 18.15 MeV states in 11Be. Monte Carlo simulations using an R-matrix formalism lead to the conclusion that the AHe resonance states play a significant role in the break-up of these states. The results exclude an earlier assumption of a phase-space description of the break-up process of the 18.15 MeV state. Evidence for extra sequential decay paths is found for both states.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M. Madurga, M.J.G. Borge, J.C. Angélique, L. Bao, U. Bergmann, et al.. Study of beta-delayed 3-body and 5-body breakup channels from the decay of 11Li. Nuclear Physics A, 2008, 810, pp.1-12. ⟨10.1016/j.nuclphysa.2008.07.008⟩. ⟨in2p3-00324001⟩