New gamma transitions in 193Ir from the beta decay of 193Os

Abstract

The population and the mode of decay of the low-lying excited levels of 193 Ir have been investigated by single and γγ coincidence spectroscopy using 192 Os enriched to 99% and several HPGe detectors. From singles spectra analysis the energies of 71 gamma rays have been determined with a better overall precision than previously, 17 of them for the first time. The energies at 1043.244(15) and 1316.628(18)keV , observed for the first time in this work, as well as some preliminary coincidence relationships, suggest that the end point energy Q βmax (≈1.14MeV) must be further investigated.

Investigation of excited levels in 193Ir from the beta decay of 193Os

“…Most of the γ-ray intensities were taken from a previous singles spectroscopy experiment [10,11]; in the cases where the spectroscopy results didn't agree (within 2σ) with the reference values from [1], when the transition hadn't been seen in the spectroscopy experiment, and also for every new transition, I(γ) was calculated from γ − γ coincidence analysis by assuming that ∑ AB,AC...CD W (θ) k, where k is constant for all transitions, regardless of their multipolarity and mixing ratio; this would be true if the detectors covered 4π -in the present case, the assumption was tested on several well-established transitions, and the values obtained were in excellent agreement with the expected ones. This way, if two gamma transitions γ 1 and γ 2 are in direct coincidence with a third one γ 3 (i.e., there are no intermediate transitions between γ 1 and γ 3 or between γ 2 and γ 3 ); then: where A(i j) is the area of the coincidence photopeak for the pair γ i × γ j and ε(i j) is the sum of the detection efficiencies of all six detector pairs for the cascade.…”

Desenvolvimento e implementação de um novo sistema pneumático de transferência para irradiação de materiais no reator IEA-R1

“…análise de elementos traços em cabelo [29] e análise de amostras de sangue [18,31,32,33,34,35,36,37,38,39,40,41,42,43]; investigação de parâmetros nucleares [44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61].…”