Study of β-delayed charged particle emission of ¹¹Li : Evidence of new decay channels

Summary, in English

The break-up of the 18.2 MeV state in ¹¹Be was studied in a ¹¹Li β-decay experiment. We report here on the study of the dominating breakup channels involving na⁶He or 3n2α in the final state, with special emphasis dedicated in this contribution to the three-particle channel. The two emitted charged particles were detected in coincidence using a highly segmented experimental set-up. The observed experimental energy-vs-energy scatter plot indicates a sequential breakup where nuclei of mass 4, alpha particles, and mass 7, ⁷He, are involved. A Monte-Carlo simulation of the sequential channel, ¹¹Be* → α + ⁷He → nα⁶He was performed and compared to the experimental data and to a simulation of the direct break-up of the 18.2 MeV state nα⁶He by phase space energy distribution. The energy-versus-energy plot are explained by the sequential simulation but not by the phase space simulation.

• Author: M. Madurga; M. J G Borge; J. C. Angelique; L. Bao; U. Bergmann; A. Butǎ; J. Cederkäll; J. M. Daugas; C. Aa Diget; L. M. Fraile; H. O U Fynbo; H. B. Jeppesen; B. Jonson; E. Lienard; F. Marechal; M. Marques; V. Meot; F. Negoita; T. Nilsson; G. Nyman; F. Perrot; K. Riisager; O. Roig; O. Tengblad; E. Tengborn; M. Turrion; K. W. Rolander
• Publishing year: 2008-05-01
• Language: English
• Publication/Series: Journal of Physics: Conference Series
• Volume: 111
• Issue: 1
• Links: http://dx.doi.org/10.1088/1742-6596/111/1/012024
• Document type: Journal article
• Publisher: IOP Publishing
• Status: Published
• ISBN/ISSN/Other: ISSN: 1742-6588