标题： 接近伽莫夫窗口的储存离子：在ESR储存环中直接测量$^{124}$Xe(p,$γ$) 显示英文标题

标题： Approaching the Gamow window with stored ions: Direct measurement of $^{124}$Xe(p,$γ$) in the ESR storage ring

摘要： 我们报告了在重离子储存环中对$^{124}$Xe 低能质子捕获截面的首次测量。$^{124}$Xe$^{54+}$离子在 5.5 AMeV 到 8 AMeV 之间的五种不同束流能量下被储存，以与无窗氢靶碰撞。$^{125}$Cs 反应产物被直接检测到。相互作用能量位于超新星和 X 射线双星等高温、爆炸性情景的 Gamow 窗口的高能尾部。这些结果对该质量范围内的预测天体物理反应速率是一个重要的验证。在低能天体物理重要质子宽度的预测中发现了良好的一致性，测量值与理论值之间仅有 30% 的差异。在中子发射阈值以上发现了更大的偏差，其中中子宽度和${\gamma}$宽度显著影响截面。新建立的实验方法是研究低质心能量下稀有离子束核反应的非常有力的工具。 显示英文摘要

摘要： We report the first measurement of low-energy proton-capture cross sections of $^{124}$Xe in a heavy ion storage ring. $^{124}$Xe$^{54+}$ ions of five different beam energies between 5.5 AMeV and 8 AMeV were stored to collide with a windowless hydrogen target. The $^{125}$Cs reaction products were directly detected. The interaction energies are located on the high energy tail of the Gamow window for hot, explosive scenarios such as supernovae and X-ray binaries. The results serve as an important test of predicted astrophysical reaction rates in this mass range. Good agreement in the prediction of the astrophysically important proton width at low energy is found, with only a 30% difference between measurement and theory. Larger deviations are found above the neutron emission threshold, where also neutron- and ${\gamma}$-widths significantly impact the cross sections. The newly established experimental method is a very powerful tool to investigate nuclear reactions on rare ion beams at low center-of-mass energies.