Attenuation of vacuum ultraviolet light in pure and xenon-doped liquid argon -An approach to an assignment of the near-infrared emission from the mixture

Results of transmission experiments of vacuum ultraviolet light through a 11.6 cm long cell filled with pure and xenon-doped liquid argon are described. Pure liquid argon shows no attenuation down to the experimental short-wavelength cut-off at 118 nm. Based on a conservative approach, a lower limit...

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Bibliographic Details
Published in:Europhysics letters 2015-07, Vol.111 (1), p.12001-p1-12001-p6
Main Authors: Neumeier, A., Dandl, T., Himpsl, A., Oberauer, L., Potzel, W., Schönert, S., Ulrich, A.
Format: Article
Language:English
Subjects:
29.40.Mc
33.20.Ni
61.25.Bi
Absorption
Argon
Attenuation
Calibration
Electron beams
Emission
Equivalence
Excitation
Excitons
Liquids
Mixtures
Near infrared radiation
Ultraviolet
Ultraviolet radiation
Xenon
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Summary:Results of transmission experiments of vacuum ultraviolet light through a 11.6 cm long cell filled with pure and xenon-doped liquid argon are described. Pure liquid argon shows no attenuation down to the experimental short-wavelength cut-off at 118 nm. Based on a conservative approach, a lower limit of 1.10 m for the attenuation length of its own scintillation light could be derived. Adding xenon to liquid argon at concentrations on the order of parts per million leads to strong xenon-related absorption features which are used for a tentative assignment of the recently found near-infrared emission observed in electron-beam excited liquid argon-xenon mixtures. Two of the three absorption features can be explained by perturbed xenon transitions and the third one by a trapped exciton (Wannier-Mott) impurity state. A calibration curve connecting the equivalent width of the absorption line at 140 nm with xenon concentration is provided.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/111/12001