In Situ Ge(Li) And Nai(Tl) Gamma-Ray Spectrometry.

Abstract

The use of large NaI(T1) crystals and large Ge (Li) diodes to make -in -sit u measurements of y-rays from sources in the soil and air is described. Methods for inferring source concentrations and contributions to the total exposure rate from individual emitters are discussed and tables of photon flux to source activity and flux to exposure rate conversion factors are presented. Descriptions are given of the Calibration of 4 in. by 4 in. NaI (T1) detectors, and 25 cm ³ and 60 cm ³ Ge(Li) diodes. A number of applications of field spectrometry are discussed.

Keywords

INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AIR
GAMMA SPECTROMETERS
LI-DRIFTED GE DETECTORS
OPERATION
PERFORMANCE
RADIATION MONITORING
RADIOACTIVITY
SODIUM IODIDES
SOILS
SOLID SCINTILLATION DETECTORS
USES

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