文章基本信息

标题：Study of Astrophysically Important Excited States of 30S via the 28Si(3He,nγ)30S
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作者：K. Setoodehnia ; A. Chen ; T. Komatsubara 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The 29P(p,g )30S reaction rate strongly affects explosive hydrogen burning in classical novae and type I X-ray bursts, and depends on the structure of proton unbound 30S states. The rate in the temperature characteristic of nucleosynthesis in novae and X-ray bursts had been previously predicted to be dominated by two low-lying, unobserved, Jp = 3+ and 2+ resonances above the proton threshold in 30S. Since then, two states have been found at 4699(6) keV and 4814(3) keV, which were tentatively assigned to be the 3+ and 2+ states, respectively. To confirm the existence of these two levels and their energies, the structure of 30S was investigated via an in-beam g -ray spectroscopy experiment using the 28Si(3He, ng )30S reaction at University of Tsukuba Tandem Accelerator Complex in Japan. This work describes the experimental setup and presents the preliminary results.