Measurement of F17 ( d,n ) Ne18 and the impact on the F17 ( p,γ ) Ne18 reaction rate for astrophysics
Measurement of F17 ( d,n ) Ne18 and the impact on the F17 ( p,γ ) Ne18 reaction rate for astrophysics
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F17 ( d,n ) Ne18 的测量及其对天体物理学中 F17 ( p,γ ) Ne18 反应速率的影响
DOI：
10.1103/physrevc.96.045812
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发表时间：
2017
影响因子：
3.1
通讯作者：
Gardiner, H. E.
中科院分区：
文献类型：
--
作者：
Kuvin, S. A.;Belarge, J.;Baby, L. T.;Baker, J.;Wiedenhöver, I.;Höflich, P.;Volya, A.;Blackmon, J. C.;Deibel, C. M.;Gardiner, H. E.
背景：该反应是天体物理学“热CNO”循环的一部分，在新星等天体物理环境中非常重要。它的热反应速率低，由于共振能量相对较高，因此在温度低于0.4 GK的恒星环境中主要是直接的，非共振捕获。目的：建立一种实验方法，在放射性离子束实验中提取质子强度到束缚态和非束缚态，并确定反应中的直接和共振捕获参数。方法：使用短寿命同位素束和称为共振的中子，质子，射线和重离子探测器的紧凑装置，在逆运动学中测量反应。结果：在1.17MeV和1.17MeV的最低质子共振的光谱因子被确定，产生的结果与以前的质子弹性散射测量一致。本文确定了中束缚态和态的渐近归一化系数，并提取了由此得到的直接俘获反应速率。结论：首次从中的实验数据确定了反应的直接俘获组分。
Background:Thereaction is part of the astrophysical “hot CNO” cycles that are important in astrophysical environments like novas. Its thermal reaction rate is low owing to the relatively high energy of the resonances and therefore is dominated by direct, nonresonant capture in stellar environments at temperatures below 0.4 GK.Purpose:An experimental method is established to extract the proton strength to bound and unbound states in experiments with radioactive ion beams and to determine the parameters of direct and resonant capture in thereaction.Method:Thereaction is measured in inverse kinematics using a beam of the short-lived isotopeand a compact setup of neutron, proton,-ray, and heavy-ion detectors calledresoneut.Results:The spectroscopic factors for the lowestproton resonances atand 1.17 MeV are determined, yielding results consistent withinof previous proton elastic-scattering measurements. The asymptotic normalization coefficients of the boundandstates inare determined and the resulting direct-capture reaction rates are extracted.Conclusions:The direct-capture component of thereaction is determined for the first time from experimental data on.