arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0801.1531nucl-ex
收藏

液氩中闪烁的时间依赖性和脉冲形状鉴别

Scintillation time dependence and pulse shape discrimination in liquid argon

W. H. Lippincott, K. J. Coakley, D. Gastler, A. Hime, E. Kearns, D. N. McKinsey, J. A. Nikkel, L. C. Stonehill

摘要:

使用单相液氩探测器的信号产率为4.85光电子每千电子当量反冲能量(keVee),我们测量的闪烁时间依赖性的电子和核反冲液氩下降到5 keVee。我们发展了两种脉冲形状鉴别方法来区分电子反冲和核反冲。使用这些方法之一,我们测量的背景和电磁学限制的水平的电子反冲污染是$7.6\times10^{-7}$之间的60和128千电子伏的核反冲能量(千电子伏)的核反冲接受率为50%,没有核反冲类似的事件超过72千电子伏。最后,我们发展了一个极大似然方法的脉冲形状歧视使用测量的闪烁时间依赖性和预测的灵敏度在三种配置的液氩暗物质探测器的WIMP-核子散射。

英文摘要:

Using a single-phase liquid argon detector with a signal yield of 4.85 photoelectrons per keV of electronic-equivalent recoil energy (keVee), we measure the scintillation time dependence of both electronic and nuclear recoils in liquid argon down to 5 keVee. We develop two methods of pulse shape discrimination to distinguish between electronic and nuclear recoils. Using one of these methods, we measure a background and statistics-limited level of electronic recoil contamination to be $7.6\times10^{-7}$ between 60 and 128 keV of nuclear recoil energy (keVr) for a nuclear recoil acceptance of 50% with no nuclear recoil-like events above 72 keVr. Finally, we develop a maximum likelihood method of pulse shape discrimination using the measured scintillation time dependence and predict the sensitivity to WIMP-nucleon scattering in three configurations of a liquid argon dark matter detector.

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。

↑