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arXiv 1902.00596nucl-exhep-exphysics.ins-det
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氩的中子俘获截面测量

Measurement of the neutron capture cross-section on argon

V. Fischer, L. Pagani, L. Pickard, A. Couture, S. Gardiner, C. Grant, J. He, T. Johnson, E. Pantic, C. Prokop, R. Svoboda, J. Ullmann, J. Wang

备注：
5 pages, 4 figures; final version of the paper; added details and fix references
发表信息：
Phys. Rev. D 99, 103021 (2019)
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摘要：

使用氩作为中微子和暗物质实验的探测和屏蔽介质，使得精确了解氩上中子俘获的截面成为一个重要的设计和操作参数。由于以前的测量是在热谱上平均的，并且具有显著的差异，因此使用飞行时间中子束和$\sim$ 4 $π$伽马谱仪进行了差分测量。假设$1/v$能量依赖性，对来自$0.015-0.15$ \，eV的微分截面的拟合产生$σ^{2200} = 673 \pm 26 \text{ (stat.)} \pm 59 \text{ (sys.)}$ \，mb。

英文摘要：

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$4$π$ gamma spectrometer. A fit to the differential cross section from $0.015-0.15$\,eV, assuming a $1/v$ energy dependence, yields $σ^{2200} = 673 \pm 26 \text{ (stat.)} \pm 59 \text{ (sys.)}$\,mb.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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