Constraining the astrophysical p process: Cross section measurement of the Kr84(p,γ)Rb85 reaction in inverse kinematics
Constraining the astrophysical p process: Cross section measurement of the Kr84(p,γ)Rb85 reaction in inverse kinematics
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约束天体物理 p 过程：逆运动学中 Kr84(p,γ)Rb85 反应的横截面测量
DOI：
10.1103/physrevc.105.065804
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发表时间：
2022
影响因子：
3.1
通讯作者：
Pereira, J.
中科院分区：
文献类型：
--
作者：
Palmisano-Kyle, A.;Spyrou, A.;DeYoung, P. A.;Dombos, A.;Gastis, P.;Olivas-Gomez, O.;Harris, C.;Liddick, S.;Lyons, S. M.;Pereira, J.
核天体物理学中最大的问题之一是了解元素的来源以及它们是如何形成的。这项工作的重点是这个过程，一个核合成过程，由一系列的光分解反应组成，负责在稳定的富含质子的一侧产生稳定的同位素。这些被称为原子核的原子核不能通过众所周知的中子俘获过程产生。目前的过程模型在很大程度上依赖于理论来提供相关的反应速率来预测终核丰度，需要更多的实验数据。本研究报告了密歇根州立大学国家超导回旋加速器实验室（NSCL）的太阳探测器使用ReA设备进行的反运动学反应截面测量实验。逆反应是过程反应网络中的一个分支点，在核生成的敏感性研究中被强调为一个重要的反应。设计并制作了一种新的氢气靶，并开发了一种新的背景减法分析技术和探测器效率计算方法。实验截面与标准统计模型计算结果进行了比较。
One of the biggest questions in nuclear astrophysics is understanding where the elements come from and how they are made. This work focuses on theprocess, a nucleosynthesis process that consists of a series of photodisintegration reactions responsible for producing stable isotopes on the proton-rich side of stability. These nuclei, known as thenuclei, cannot be made through the well-known neutron-capture processes. Currently-process models rely heavily on theory to provide the relevant reaction rates to predict the final-nuclei abundances and more experimental data is needed. The present work reports on an experiment performed with the SuN detector at the National Superconducting Cyclotron Laboratory, NSCL, at Michigan State University using the ReA facility to measure thereaction cross section in inverse kinematics. The reversereaction is a branching point in the-process reaction network that was highlighted as an important reaction in sensitivity studies in the production of thenucleus. A new hydrogen gas target was designed and fabricated and a new analysis technique for background subtraction and efficiency calculations of the detector were developed. The experimental cross section is compared to standard statistical model calculations using thenon-smokerandtalyscodes.