Wilbert Smith Archives Files Box 1131 19 1131-19-p218

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tion spectrometry; as a result most neu- ‘ron-activation analyses are based on gamma ray data, In scintillation spectrometry gamma ~ rays are detected by causing them to in- teract with a material that responds to the interaction by scintillating, that is, by emitting photons of visible light whose intensity is directly proportional to the energy of the absorbed gamma ray. The most widely used scintillating material is a single crystal of sodium io- dide “doped” with a small amount of the...