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An argon gas proportional scintillation counter with UV avalanche photodiode scintillation readout

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5 Author(s)
Monteiro, C.M.B. ; Dept. de Fisica, Coimbra Univ., Portugal ; Lopes, J.A.M. ; Simoes, P.C.P.S. ; Santos, F.P.
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An uniform-field argon-filled gas proportional scintillation counter, using a large-area avalanche photodiode, is presented. The excitation and ionization thresholds for argon were found to be approximately 0.7 and 3.7 V cm-1 torr-1, respectively. An upper limit of 0.30±0.04 was measured for the argon Fano factor for 5.9-keV X-rays. An energy resolution of 12.5% full-width-at-half-maximum was achieved for 5.9-keV X-rays. The ultraviolet large-area avalanche photodiode proved to be suitable for reading the scintillation light of an argon-filled gas proportional scintillation counter, providing a quantum efficiency of about 50% at 128 nm. Good photodiode performance is already achieved for gains about 100

Published in:

Nuclear Science, IEEE Transactions on  (Volume:48 ,  Issue: 4 )

Date of Publication:

Aug 2001

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