New Generation of Experiments for the Investigation of Stellar (p, γ) Reaction Rates Using SAMURAI
New Generation of Experiments for the Investigation of Stellar (p, γ) Reaction Rates Using SAMURAI
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使用 SAMURAI 研究恒星 (p, γ) 反应速率的新一代实验
DOI：
10.11804/nuclphysrev.33.02.146
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Saastamome
中科院分区：
文献类型：
--
作者：
Panin;Yoneda;Kurokawa;Blackmon;Elekes;Kim;Motobayashi;Otsu;Rasco;Saastamome
未来的实验活动与日本理研研究所的SAMURAI装置将探索广泛的中子缺乏核，特别关注与i型x射线爆发（XRB）中天体物理rp过程相关的最关键（p, γ）反应速率。数百MeV/核子能量的强放射性离子（RI）束将通过库仑激发或核子去除过程在感兴趣的原子核中填充质子非束缚态。利用完全运动学方法测量这些态衰变为质子和重残态的过程，得到时间反转质子捕获过程的信息。这种方法将为共振提供重要的实验数据，共振决定了恒星（p,γ）的反应速率，也提供了其他一些情况下直接质子捕获过程的实验数据。实验装置将首次利用SAMURAI光谱仪的高分辨率90◦模式，结合现有的检测系统，包括定制设计的硅条探测器，用于同时检测和跟踪从目标发射的重离子和质子。本文详细讨论了实验方法和所使用的仪器。
The future experimental campaign with the SAMURAI setup at RIKEN will explore a wide range of neutron-deficient nuclei with a particular focus on the most critical (p, γ) reaction rates relevant to the astrophysical rp-process in type-I X-ray bursts (XRB). Intense radioactive-ion (RI) beams at an energy of a few hundred MeV/nucleon will be deployed to populate proton-unbound states in the nuclei of interest through the Coulomb excitation or nucleon-removal processes. The decay of these states into a proton and a heavy residue will be measured using complete kinematics and the information about time reversal proton-capture process will be obtained. This method will provide the vital experimental data on the resonances, which dominate the stellar (p,γ) reaction rates, as well as on the direct proton-capture process for some other cases. The experimental setup will utilize for the first time the High-Resolution 90◦-mode of the SAMURAI spectrometer in combination with the existing detection systems, including custom-designed Si-strip detectors for simultaneous detection and tracking of heavy ions and protons emitted from the target. The details of the experimental method and the utilized apparatus are discussed in this paper.