文章基本信息

标题：Study of the Beta-delayed multiple particle break-up of the 2.43 MeV state in Be-9
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作者：M. Madurga Flores ; M.J.G. Borge ; H.O.U. Fynbo, B.,Jonson 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The aim of this work is to study the b-delayed multiparticle break-up of the 5/2− state in 9Be at 2.43 MeV excitation energy. This process is relevant as it has been proposed recently that this level plays a role in the a(an,g)9Be reaction. This state breaks-up in 2a+n, and sequential as well as direct ("democratic") decay have previously been considered. In our work energy and direction of the two emitted a particles has been measured, while those of the neutron have been reconstructed. The sequential decay is considered using the R-matrix formalism. For the democratic decay the hyper-spherical harmonics functions are used. The different decay processes are compared with the data using the Monte-Carlo method. Our preliminary results indicate that the data is better described when democratic decay is assumed.