30 S RI射束产生和X射线爆发
30S RI Beam Production and X-ray Bursts
摘要：
目前的工作报告的结果，30 S放射性核束的发展，为未来的实验直接测量数据外推的30 S（α，p）恒星的反应速率在I型X射线爆发，核爆炸的现象发生在吸积中子星的表面上反复。我们用6.9和7.54MeV/u的28 Si束轰击低温冷却的3 He靶，通过3 He（28 Si，30 S）n反应产生放射性离子30 S。为了在未来成功地进行实验，使我们能够计算出恒星30 S（α，p）的反应速率，豪泽-费什巴赫的计算表明，我们需要一个每秒约10^5个粒子、能量约为32兆电子伏的30 S束流。根据我们最近在2006年和2008年进行的梁开发实验，据信根据所提供的结果，这样的梁可能在2009年制造。我们计划在2009年测量4 He（30 S，p）截面，并对计划中的（alpha，p）技术作了简要的评述。
英文摘要：
The present work reports the results of 30S radioactive beam development for a future experiment directly measuring data to extrapolate the 30S(alpha,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(alpha, p) reaction rate, Hauser-Feshbach calculations indicate we require a 30S beam of ~10^5 particles per second 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 (alpha,p) technique are also elucidated.
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