TY - JOUR
T1 - Attenuation of vacuum ultraviolet light in liquid argon
AU - Neumeier, A.
AU - Hofmann, M.
AU - Oberauer, L.
AU - Potzel, W.
AU - Schönert, S.
AU - Dandl, T.
AU - Heindl, T.
AU - Ulrich, A.
AU - Wieser, J.
N1 - Funding Information:
We thank Roman Gernhäuser for kindly providing the gas system. This work was supported by funds of the Maier-Leibnitz-Laboratorium (Garching).
PY - 2012/11
Y1 - 2012/11
N2 - The transmission of liquid argon has been measured, wavelength resolved, for a wavelength interval from 118 to 250 nm. The wavelength dependent attenuation length is presented for pure argon. It is shown that no universal wavelength independent attenuation length can be assigned to liquid argon for its own fluorescence light due to the interplay between the wavelength dependent emission and absorption. A decreasing transmission is observed below 130 nm in both chemically cleaned and distilled liquid argon and assigned to absorption by the analogue of the first argon excimer continuum. For not perfectly cleaned argon a strong influence of impurities on the transmission is observed. Two strong absorption bands at 126. 5 and 141. 0 nm with approximately 2 and 4 nm width, respectively, are assigned to traces of xenon in argon. A broad absorption region below 180 nm is found for unpurified argon and tentatively attributed to the presence of water in the argon sample.
AB - The transmission of liquid argon has been measured, wavelength resolved, for a wavelength interval from 118 to 250 nm. The wavelength dependent attenuation length is presented for pure argon. It is shown that no universal wavelength independent attenuation length can be assigned to liquid argon for its own fluorescence light due to the interplay between the wavelength dependent emission and absorption. A decreasing transmission is observed below 130 nm in both chemically cleaned and distilled liquid argon and assigned to absorption by the analogue of the first argon excimer continuum. For not perfectly cleaned argon a strong influence of impurities on the transmission is observed. Two strong absorption bands at 126. 5 and 141. 0 nm with approximately 2 and 4 nm width, respectively, are assigned to traces of xenon in argon. A broad absorption region below 180 nm is found for unpurified argon and tentatively attributed to the presence of water in the argon sample.
UR - http://www.scopus.com/inward/record.url?scp=84867655779&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-012-2190-z
DO - 10.1140/epjc/s10052-012-2190-z
M3 - Article
AN - SCOPUS:84867655779
SN - 1434-6044
VL - 72
SP - 1
EP - 9
JO - European Physical Journal C
JF - European Physical Journal C
IS - 10
M1 - 2190
ER -