Neutral bremsstrahlung electroluminescence in noble liquids

Abstract

Proportional electroluminescence (EL) is the physical effect used in two-phase dark matter detectors, to optically record in the gas phase the ionization signal produced by particle scattering in the liquid phase. In our previous works the presence of a new EL mechanism in noble gases, namely that of neutral bremsstrahlung (NBrS), was demonstrated both theoretically and experimentally, in addition to the ordinary EL mechanism due to excimer emission. In this work we show that the similar theoretical approach can apply to noble liquids, namely to liquid helium, neon, argon, krypton and xenon. In particular, the photon yields and spectra for NBrS EL in noble liquids have for the first time been calculated, using the electron energy and transport parameters obtained in the framework of Cohen-Lekner and Atrazhev theory. The relevance of the results obtained to the development of noble liquid detectors for dark matter searches and neutrino experiments is discussed.

7 pages, 6 figures

References in corpus (7)

• A concise review on THGEM detectors
• Liquid noble gas detectors for low energy particle physics
• Optical readout tracking detector concept using secondary scintillation from liquid argon generated by a thick gas electron multiplier
• Review of Liquid Argon Detector Technologies in the Neutrino Sector
• Electroluminescence and electron avalanching in two-phase detectors
• Photon emission and atomic collision processes in two-phase argon doped with xenon and nitrogen
• Electron scattering and transport in liquid argon

Cited by in corpus (8)

• Bremsstrahlung on noble gases at low energies
• Novel electron and photon recording concepts in noble-liquid detectors
• Puzzling time properties of proportional electroluminescence in two-phase argon detectors for dark matter searches
• First observation of neutral bremsstrahlung electroluminescence in liquid argon
• Unraveling the puzzle of slow components in gaseous argon of two-phase detectors for dark matter searches using Thick Gas Electron Multiplier
• Snowmass Instrumentation Frontier IF08 Topical Group Report: Noble Element Detectors
• Neutral bremsstrahlung electroluminescence in noble liquids revisited
• Possible evidence for the production of Ar${}_2^{\ast -}$ metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches