Abstract

A systematic investigation of the different effects causing Doppler broadening when detecting γ rays following the depopulation of high spin nuclear states is performed. The size of the various effects is calculated or estimated to see how much they influence the resolution of γ lines at different emission angles. Simple formulas are used for most of the effects. The investigation has resulted in a program which calculates the broadening at any angle and also gives the detector collimators needed to get equal or accepted resolution at all angles. A concrete example on a calculation with this program is presented.

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