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, b₁. 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 b₁ = 0.697(6), α_T = 0.452(8), P_γ = 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 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.