Absolute light yield measurements on BaF/sub 2/ crystals and the quantum efficiency of several photomultiplier tubes

Abstract
The,quantum,efficiency (QE) curves,of five Philips XP2020Q photomultiplier($#$#is overestimated. Our results, obtained,by means,of calibrated equipment,and using 662 keV -prays, yield a value of 1400 photons/hfeV.

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