Abstract
The fission products 144Ce 144Pr, 106Rh and 95Zr play an important role in the burn-up determination of fuel elements by means of γ-ray spectrometry. One of the crucial quantities in this field is the absolute γ-ray emission probability (intensity) for which values available in literature have not the desirable accuracy of 1–2%. By using Ge(Li)-spectrometers of known efficiency and sources calibrated by 4πβ-γ-coincidence methods, we determined absolute γ-ray emission probabilities of 144Ce 144Pr, 106Rh and 95Zr with an uncertainty of ±1% for the main γ-rays.
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