Title :
Absolute light yield measurements on BaF2 crystals and the quantum efficiency of several photomultiplier tubes
Author :
Dorenbos, P. ; de Haas, J.T.M. ; Visser, R. ; van Eijk, C.W.E. ; Hollander, R.W.
Author_Institution :
Dept. of Appl. Phys., Delft Univ. of Technol., Netherlands
fDate :
8/1/1993 12:00:00 AM
Abstract :
The quantum efficiency curves of five Philips XP2020Q photomultiplier tubes (PMTs), one Hamamatsu R2059 PMT, and a Na-salicylate coated glass window are determined using a calibrated Thorn EMI 9426 PMT as a reference. The QE of XP2020Q PMTs at wavelengths smaller than 230 nm appears much better than the values specified by the manufacturer. Consequently, the often reported photon yield of 2000 photons/MeV for the fast component of the scintillation pulses from pure BaF2 crystals determined with this tube is overestimated. The authors´ results, obtained by means of calibrated equipment and using 662-keV γ-rays, yield a value of 1400 photons/MeV
Keywords :
barium compounds; photoluminescence; photomultipliers; scintillation; scintillation counters; γ-rays; 230 nm; 662 keV; BaF2 crystals; Hamamatsu R2059; Na-salicylate coated glass window; Philips XP2020Q photomultiplier tubes; absolute light yield; photon yield; quantum efficiency curves; Crystalline materials; Glass; Manufacturing; Optical coupling; Optical materials; Photodiodes; Photomultipliers; Photonic crystals; Physics; Windows;
Journal_Title :
Nuclear Science, IEEE Transactions on
