Abstract
Utilizing Pu isotopic standards characterized by the Institute for Nuclear Materials and Measurement (IRMM), New Brunswick Laboratory (NBL) measured the γ-ray branching ratios of the 148.567-keV 241Pu, the 152.72-keV 238Pu, the 159.995-keV 241Pu and the 160.28-keV 240Pu γ-rays. The study reported here includes the measurement of four IRMM standards, utilizing three different detectors for a total of 16 spectra, finding branching ratios of (1.863 ± 0.008) × 10 −6, (9.230 ± 0.068) × 10 −6, (6.321 ± 0.040) × 10 −8 and (4.065 ± 0.017) × 10 −6, γ/disintegration, respectively.
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