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首页> 外文期刊>Physical review, C >Experimental study of Ar-38 + alpha reaction cross sections relevant to the Ca-41 abundance in the solar system
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Experimental study of Ar-38 + alpha reaction cross sections relevant to the Ca-41 abundance in the solar system

机译：AR-38 +α反应横截面与太阳系CA-41丰度相关的实验研究

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In massive stars, the Ca-41(n, alpha)Ar-38 and K-41(p, alpha)Ar-38 reactions have been identified as the key reactions governing the abundance of Ca-41, which is considered as a potential chronometer for solar system formation. So far, due to experimental limitations, the Ca-41(n, alpha)Ar-38 reaction rate is solely based on statistical model calculations. In the present study, we have measured the time-inverse Ar-38(alpha, n)Ca-41 and Ar-38(alpha, p)K-41 reactions using an active target detector. The reactions were studied in inverse kinematics using a 133-MeV Ar-38 beam and He-4 as the active-gas target. Both excitation functions were measured simultaneously in the energy range of 6.8 = E-c.m. = 9.3 MeV. Using detailed balance the Ca-41(n, alpha)Ar-38 and K-41(p, alpha)Ar-38 reaction rates were determined, which suggested a 20% increase in the Ca-41 yield from massive stars.
机译：在大规模恒星中，已鉴定Ca-41（N，α）Ar-38和K-41（P，α）Ar-38反应作为Ca-41丰富的关键反应，其被认为是潜力的 太阳系形成的计时器。 到目前为止，由于实验限制，Ca-41（N，α）AR-38反应速率仅基于统计模型计算。 在本研究中，使用活性靶检测器测量时间逆Ar-38（α，N）Ca-41和Ar-38（α，P）K-41反应。 使用133meV Ar-38梁和He-4作为活性气体靶的反相研究反应。 在6.8℃的能量范围内同时测量两个激励功能。 ＆ = 9.3 mev。 使用详细的平衡，测定Ca-41（N，α）Ar-38和K-41（P，α）反应速率，这表明来自大米恒星的Ca-41产量增加了20％。

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