Investigating the slow component of the infrared scintillation time response in gaseous xenon

• DOI: 10.48550/arxiv.2401.09262
• Publication Date: 2024-01-01
• Authors: R. Hammann; Kai Böse; Luisa Hötzsch; Florian Jörg; T. Marrodán Undag...
• Keywords: Time constant; Bar (unit); Response time

Xenon is the target material of choice in several rare event searches. The use infrared (IR) scintillation light, addition to commonly used vacuum ultraviolet (VUV) could increase sensitivity these experiments. Understanding IR response xenon essential assessing potential for improvement. This study focuses on characterizing time and light yield (LY) gaseous alpha particles at atmospheric pressure room temperature. We have previously observed that can be described by two components: one with a fast constant O(ns) slow O($\mathrm{\mu}$s). work presents new measurements improve our understanding component. experimental setup was modified allow measurement ten times longer window about 3 $\mathrm{\mu}$s, effectively mitigating dominant systematic uncertainty LY measurement. find component 1 bar single exponential function decay 850 ns. found (6347 $\pm$ 22 (stat) 400 (syst)) ph / MeV, consistent previous In addition, zero electric field along particle tracks conducted rule out possibility dominated emission from drifting electrons or recombination ions.