Test of internal-conversion theory with a measurement in Cd-111
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The Authors, published by EDP Sciences, 2017. We have measured the K-shell and total internal conversion coefficients for the 150.8-keV E3 transition in 111Cd: K = 1.449(18) and T = 2.217(26) respectively. The K value agrees well with Dirac-Fock calculations, in which the effect of the K-shell atomic vacancy is included. It is consistent with our previous precise measurements of K values, which cover a range of atomic numbers, and extends that range down to Z = 48. The T measurement, however, disagrees by about two standard deviations from the calculated T value, whether the atomic vacancy is included or not.