文章基本信息

标题：Astrophysical (alpha,p) cross section technique and 30S RIB Development
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作者：D. Kahl ; A.A. Chen ; D.N. Binh 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2008
卷号：2008
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The present work reports the results of 30S radioactive beam development for a future experiment directly measuring data to extrapolate the 30S(a,p) stellar reaction rate in Type I X-ray bursts, a phenomena where nuclear explosions occur repeatedly on the surface of accreting neutron stars. We produce the radioactive ion 30S via the 3He(28Si,30S)n reaction, by bombarding a cryogenically cooled target of 3He at 400 Torr and 80 K with 28Si beams of 6.9 and 7.54 MeV/u. In order to perform a successful future experiment which allows us to calculate the stellar 30S(a, p) reaction rate, Hauser-Feshbach calculations indicate we require a 30S beam of 105 particles per second (pps) at 32 MeV. Based on our recent beam development experiments in 2006 and 2008, it is believed that such a beam may be fabricated in 2009 according to the results presented. We plan to measure the 4He(30S,p) cross-section at astrophysical energies in 2009, and some brief remarks on the planned (a,p) technique are also elucidated.