First time-resolved measurement of infrared scintillation light in gaseous xenon

Mona PiotterDominick CichonRobert HammannFlorian J\"orgLuisa H\"otzschTeresa Marrod\'an Undagoitia

Mar 2023

摘要

Xenon is a widely used detector target material due to its excellentscintillation properties in the ultraviolet (UV) spectrum. The additional useof infrared (IR) scintillation light could improve future detectors. However, acomprehensive characterization of the IR component is necessary to explore itspotential. We report on the first measurement of the time profile of the IRscintillation response of gaseous xenon. Our setup consists of a gaseous xenontarget irradiated by an alpha particle source and is instrumented with one IR-and two UV-sensitive photomultiplier tubes. Thereby, it enables IR timingmeasurements with nanosecond resolution and simultaneous measurement of UV andIR signals. We find that the IR light yield is in the same order of magnitudeas the UV yield. We observe that the IR pulses can be described by a fast and aslow component and demonstrate that the size of the slow component decreaseswith increasing levels of impurities in the gas. Moreover, we study the IRemission as a function of pressure. These findings confirm earlier observationsand advance our understanding of the IR scintillation response of gaseousxenon, which could have implications for the development of novel xenon-baseddetectors.

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