Bremsstrahlung on noble gases at low energies

Abstract

A detailed analysis of the bremsstrahlung spectrum at nonrelativistic electron scattering on argon and xenon is carried out. It is shown that the approximate formulas widely used for the description of bremsstrahlung spectra lead to predictions that significantly differ from the exact results. In the limit when the photon frequency tends to zero, a rigorous proof of the relationship between the spectrum of the bremsstrahlung with a transport cross section of electron scattering on an atom is given. This proof does not require any assumptions about the dependence of the scattering phases on energy. For electron energies lower than the luminescence threshold, it is shown that the predictions for a number of radiated photons obtained by the exact formula are in good agreement with the available experimental data.

arXiv comment15 pages, 5 figures, new section on the angular distributions is added

References in corpus (6)

• Revealing neutral bremsstrahlung in two-phase argon electroluminescence
• Neutral Bremsstrahlung emission in xenon unveiled
• Neutral bremsstrahlung electroluminescence in noble liquids
• Neutral bremsstrahlung and excimer electroluminescence in noble gases and its relevance to two-phase dark matter detectors
• Neutral bremsstrahlung in two-phase argon electroluminescence: further studies and possible applications
• Kinetics of polarization in non-relativistic scattering

Cited by in corpus (3)

• 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
• Possible evidence for the production of Ar${}_2^{\ast -}$ metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches