Decay data of 141Ce

Abstract

A 4πβ-gamma coincidence system and several efficiency calibrated semiconductor spectrometers were used to determine the following 141Ce/ 141Pr decay data: 1. The β-transition probability to the 145 keV level of 141Pr, b 1. 2. The total conversion coefficient of the 145 keV transition to the ground state of 141Pr, α T. 3. The gamma-ray emission probability of the 145 keV photons, P γ. The results are b 1 = 0.697(6), α T = 0.452(8), P γ = 0.480(5). The value of b 1 is in agreement with most of the values reported in the literature for this quantity. The value found for α T is higher than all experimental values determined previously but agrees well with the theoretically calculated value for an M1 transition with 0.48% E2 admixture ( α T = 0.4565). The value for P γ agrees with the value determined by Hansen et al. (1979), P γ = 0.482(3). In addition, emission probabilities of K and L x-rays following the decay of 141Ce are determined experimentally.