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CALIBRATION OF SCINTILLATION GAMMA SPECTROMETERS FOR ABSOLUTE MEASUREMENTS

A. N. Silant’ev

Abstract

A method for calibrating a scintillation gamma spectrometer by means of 4 pi BETA - gamma coincidences is described and a formula for processing the results is derived. An analytical expression is derived for the efficiency of the spectrometer as a function of gamma energy. A graph is presented for the efficiency of the spectrometer with sodium iodide crystals. The absolute efficiency of the spectrometer is obtained. (C.E.S.)

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Key concepts: Spectrometer, Scintillation, Scintillation counter, Calibration, Sodium iodide, Gamma ray spectrometer, Physics, Optics