标题： 氩的中子捕获截面测量 显示英文标题

标题： Measurement of the neutron capture cross-section on argon

摘要： 氩气在中微子和暗物质实验中的探测和屏蔽介质应用，使得对氩原子核捕获中子的截面精确知识成为重要的设计和操作参数。 由于以前的测量是在热谱上平均进行的，并且存在显著的不一致，因此使用飞行时间中子束和一个$\sim$4$\pi$伽马谱仪进行了微分测量。 假设能量依赖性为$1/v$，对从$0.015-0.15$电子伏特开始的微分截面进行拟合，得到$\sigma^{2200} = 673 \pm 26 \text{ (stat.)} \pm 59 \text{ (sys.)}$毫靶。 显示英文摘要

摘要： The use of argon as a detection and shielding medium for neutrino and dark matter experiments has made the precise knowledge of the cross section for neutron capture on argon an important design and operational parameter. Since previous measurements were averaged over thermal spectra and have significant disagreements, a differential measurement has been performed using a Time-Of-Flight neutron beam and a $\sim$4$\pi$ gamma spectrometer. A fit to the differential cross section from $0.015-0.15$\,eV, assuming a $1/v$ energy dependence, yields $\sigma^{2200} = 673 \pm 26 \text{ (stat.)} \pm 59 \text{ (sys.)}$\,mb.