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Alexander, T.; Arisaka, K.; Back, H.O.; Beltrame, P.; Benziger, J.; Bonfini, G.; Cadonati, L.; Calaprice, F.; Candela, A.; Cao, H.; Cavalcante, P.; Chavarria, A.; Chepurnov, A.; Cline, D.; Cocco, A.G.; Condon, C.; D’Angelo, D.; Davini, S.; De Haas, E.; Derbin, A.; Di Pietro, G.; Dratchnev, I.; Durben, D.; Empl, A.; Etenko, A.; Fan, A.; Fiorillo, G.; Fomenko, K.; Galbiati, C.; Gazzana, S.; Ghag, C.; Ghiano, C.; Goretti, A.; Grandi, L.; Gromov, M.; Guan, M.; Guo, C.; Guray, G.; Hungerford, E.V.; Ianni, Al; Ianni, An; Kayunov, A.; Kidner, S.; Kobychev, V.; Korablev, D.; Korga, G.; Shields, E.; Loer, B.; Lombardi, P.; Ludhova, L.; Lund, A.; Lung, K.; Ma, Y.; Machulin, I.; Maricic, J.; Meng, Y.; Meroni, E.; Meyers, P.D.; Mohayai, T.; Montanari, D.; Montuschi, M.; Mosteiro, P.; Mount, B.; Muratova, V.; Nelson, A.; Nemtzow, A.; Nurakhov, N.; Orsini, M.; Pallavicini, M.; Parmeggiano, S.; Pelliccia, N.; Perasso, L.; Perfetto, F.; Pinsky, L.; Pordes, S.; Ranucci, G.; Razeto, A.; Romani, A.; Saggese, P.; Saldanha, R.; Salvo, C.; Sands, W.; Seigar, M.; Semenov, D.; Skorokhvatov, M.; Smirnov, O.; Sotnikov, A.; Tatarowicz, J.; Testera, G.; Teymourian, A.; Unzhakov, E.; Wang, H.; Westerdale, S.; Wojcik, M.; Wright, A.; Xu, J.; Zavatarelli, S.; Zehfus, M.; Zhong, W.; Zuzel, G.
Astroparticle physics, 09/2013, Volume: 49Journal Article
As part of the DarkSide program of direct dark matter searches using two-phase argon TPCs, a prototype detector with an active volume containing 10kg of liquid argon, DarkSide-10, was built and operated underground in the Gran Sasso National Laboratory in Italy. A critically important parameter for such devices is the scintillation light yield, as photon statistics limits the rejection of electron-recoil backgrounds by pulse shape discrimination. We have measured the light yield of DarkSide-10 using the readily-identifiable full-absorption peaks from gamma ray sources combined with single-photoelectron calibrations using low-occupancy laser pulses. For gamma lines of energies in the range 122–1275keV, we get light yields averaging 8.887±0.003(stat)±0.444(sys) p.e./keVee. With additional purification, the light yield measured at 511keV increased to 9.142±0.006(stat) p.e./keVee.
