Abstract
The percentage resolution of the scintillation spectrometer is studied by interposing carbon, aluminum, cooper, tin and lead absorbers of different thicknesses t between the source and the detector. For these thickness γ-ray attenuation coefficients μ are measured using the counting sequence of Conner et al. 8). The results show that the percentage resolutions and attenuation coefficients remain fairly constant for values of μt<1. This implies that the number of multiple scattered photons reaching the detector becomes negligible and the narrow-beam-collimated geometry condition is preserved, when the thickness of the sample satisfies the above criterion. The present investigations indicate that the counting sequence adopted by Conner et al. 8) together with the criterion μt<1, would greatly improve the measured γ-ray attenuation coefficients.
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