论文标题
了解氙气液体氩气闪烁光的增强
Understanding the Enhancement of Scintillation Light in Xenon-Doped Liquid Argon
论文作者
论文摘要
在贵重气体中测量闪烁光是粒子物理学中的重要检测技术。许多罕见的事件搜索，例如中微子束实验，无中微子双β-末期和暗物质搜索使用基于氩气的检测器。在液体氩气中，通过添加少量的氙气可以增强光的产量，其中添加了$ \ sim 10-1000 $ ppm。一般的增强机制及其通过氩气和XENON进料器之间的能量转移的途径是众所周知的，但是原子氙气吸收吸收氩气排放的重要性尚未得到充分的理解。这种吸收大大降低了Xenon的痕量（$ \ rm \ sim \ sim 0.1 $ ppm）的市售氩气中的光产率。 $ \ sim 10 $ ppm的小氙掺杂剂恢复了这种丢失的光，从而使未掺杂的氩的光产率提高，约为两个。在本文中，我们介绍了一个用于Xenon掺杂氩气的光产生模型，包括吸收和再排放，并将其与Xenon掺杂的氩气发射的测得的时间依赖性进行比较。
Measuring the scintillation light in noble gases is an important detection technique in particle physics. Numerous rare event searches like neutrino beam experiments, neutrino-less double beta-decay, and dark matter searches use argon-based detectors. In liquid argon, the light yield can be enhanced by the addition of a small quantity of xenon, where $\sim 10 - 1000$ ppm are added. The general enhancement mechanism and its pathway via an energy transfer between argon and xenon excimers is well known, however the importance of absorption of argon excimer emission by atomic xenon has not been fully appreciated. This absorption significantly reduces the light yield in commercially available argon which contains trace amounts ($\rm \sim 0.1$ ppm) of xenon. The addition of a small xenon dopant of $\sim 10$ ppm recovers this lost light resulting in an increased light yield over un-doped argon of about a factor of two. In this paper we introduce a model for the light production in xenon doped argon, including absorption and re-emission, and compare it to the measured time dependence of light emission in xenon-doped argon.
