A scintillation spectrometer making use of a large NaI/TlI crystal mounted on an RCA 5819 photomultiplier tube has been constructed. It was designed for the high efficiency counting of gamma-rays in the energy range 0.5–1.5 Mev. Techniques used for crystal mounting and assembly of apparatus have proved very satisfactory for prolonged operation. Additional components have been provided for automatic recording of data.
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Strickler et al. (1953) studied this question.
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