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Quantum Efficiency for Electron-Hole Pair Generation by Infrared Irradiation in Germanium Cryogenic Detectors

Abstract : A study is made of the quantum efficiency of a coplanar grid ionization/heat Ge detector operated at cryogenic temperatures for dark matter search. Carrier generation is performed with infra-red LEDs of different wavelengths (1.30, 1.45, and 1.65 mu m) near the optical bandgap of germanium. The corresponding quantum efficiency is obtained from an analysis of the Joule (Luke-Neganov) effect. This investigation is part of a program to optimize the reset procedure of the detectors in the Edelweiss-II dark matter search experiment at the Modane Underground Laboratory.
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http://hal.in2p3.fr/in2p3-00686014
Contributor : Christine Hadrossek <>
Submitted on : Friday, April 6, 2012 - 4:38:46 PM
Last modification on : Wednesday, September 16, 2020 - 4:17:45 PM

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J. Domange, A. Broniatowski, E. Olivieri, M. Chapellier, L. Dumoulin. Quantum Efficiency for Electron-Hole Pair Generation by Infrared Irradiation in Germanium Cryogenic Detectors. 13th International Workshop on Low Temperature Detectors, Jul 2009, Stanford, United States. pp.314-317, ⟨10.1063/1.3292341⟩. ⟨in2p3-00686014⟩

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