Abstract

Measurements of the conversion efficiency of several inorganic scintillators are presented. Conversion efficiency is defined as the ratio of the total energy of luminescence photons to the energy expended in producing the photons. The measurement method used was based on the measurement of the intensity of the total flux of the characteristic radiation under the constant action of exciting x-rays with prescribed energy, therefore accounting for the contribution of both fast and slow components of de-excitation. Light outputs, relative to the light output of CsI(Tl) are also given for the current and pulsed modes of each scintillator material tested. Conversion efficiencies was obtained by statistical analysis. Results compared well with scintillation efficiencies obtained in referenced experiments for similar materials. The method used to measure efficiencies is concluded to be appropriate for all currently available x-ray luminophores and scintillation crystals. 6 refs., 1 fig., 2 tabs.

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