Impact of extreme ultraviolet radiation on the scintillation of pure and xenon-doped liquid argon
arXiv:2410.22863 · doi:10.1103/PhysRevD.111.102001
Abstract
The Xenon-Argon Technology (X-ArT) collaboration presents a study on the dynamics of pure and xenon-doped liquid argon (LAr) scintillation. Using two types of silicon photomultipliers sensitive to different wavelength ranges, we provide evidence in favor of a contribution from long-lived (>10 s) extreme ultraviolet (EUV) lines emitted from argon atomic states, which enhances the light yield. This component is present in both pure and xenon-doped LAr, becoming more pronounced at higher xenon concentrations, where it complements the traditional collisional energy transfer process. To explain this mechanism, we develop a comprehensive model of the Xe-doped LAr scintillation process that integrates both collisional and radiative contributions. Additionally, we investigate how xenon doping affects LAr scintillation light yield and pulse shape discrimination. Finally, we hypothesize that the EUV component may explain the emission of spurious electrons, a known challenge in light dark matter searches using noble liquids. By characterizing the scintillation dynamics in Xe-doped LAr, identifying the long-lived EUV component, and exploring the potential origin of spurious electrons, this work lays the groundwork for optimizing detector performance and advancing the design and sensitivity of future noble liquid particle detectors.
arXiv comment12 pages, 11 figures
References in corpus (25)
- Light Dark Matter Search with Ionization Signals in XENON1T
- First Results from the DarkSide-50 Dark Matter Experiment at Laboratori Nazionali del Gran Sasso
- DarkSide-50 532-day Dark Matter Search with Low-Radioactivity Argon
- Emission of Single and Few Electrons in XENON1T and Limits on Light Dark Matter
- Fluorescence Efficiency and Visible Re-emission Spectrum of Tetraphenyl Butadiene Films at Extreme Ultraviolet Wavelengths
- Observation and applications of single-electron charge signals in the XENON100 experiment
- CMB and BAO constraints for an induced gravity dark energy model with a quartic potential
- Investigation of background electron emission in the LUX detector
- Measurements of the intrinsic quantum efficiency and absorption length of tetraphenyl butadiene thin films in the vacuum ultraviolet regime
- Two distinct components of the delayed single electron background signals in liquid xenon emission detectors
- Pulseshape discrimination against low-energy Ar-39 beta decays in liquid argon with 4.5 tonne-years of DEAP-3600 data
- The liquid-argon scintillation pulseshape in DEAP-3600
- Sensitivity projections for a dual-phase argon TPC optimized for light dark matter searches through the ionization channel
- Fermionic dark matter via UV and IR freeze-in and its possible X-ray signature
- Performance of novel VUV-sensitive Silicon Photo-Multipliers for nEXO
- Intense Vacuum-Ultraviolet and Infrared Scintillation of Liquid Ar-Xe Mixtures
- Tetraphenyl Butadiene Emanation and Bulk Fluorescence from Wavelength Shifting Coatings in Liquid Argon
- Performance of Hamamatsu VUV4 SiPMs for detecting liquid argon scintillation
- DarkSide-20k sensitivity to light dark matter particles
- Xenon-Doped Liquid Argon TPCs as a Neutrinoless Double Beta Decay Platform
- Scintillation and optical properties of xenon-doped liquid argon
- Pulse shape study of the fast scintillation light emitted from xenon-doped liquid argon using silicon photomultipliers
- Near-infrared scintillation of liquid argon
- Doping Liquid Argon with Xenon in ProtoDUNE Single-Phase: Effects on Scintillation Light
- Characterization of the scintillation time response of liquid argon detectors for dark matter search