Decay data of 141Ce

A 4πβ-gamma coincidence system and several efficiency calibrated semiconductor spectrometers were used to determine the following 141Ce/141Pr decay data: the β-transition probability to the 145 keV level of 141Pr, b1; the total conversion coefficient of the 145 keV transition to the ground state of 141Pr, αT; the gamma-ray emission probability of the 145 keV photons, Pγ. The results are b1 = 0.697(6), αT = 0.452(8), Pγ = 0.480(5). The value of b1 is in agreement with most of the values reported in the literature for this quantity. The value found for αT 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 (αT = 0.4565). The value for Pγ agrees with the value determined by Hansen et al. (1979), Pγ = 0.482(3). In addition, emission probabilities of K and L x-rays following the decay of 141Ce are determined experimentally. (author)