Precise measurement of alphaK and alphaT for the 150.8-keV E3 transition in 111Cd: Test of internal-conversion theory
Abstract
We have measured the K-shell and total internal conversion coefficients, alphaK and alphaT, for the 150.8-keV E3 transition in 111Cd to be 1.449(18) and 2.217(26) respectively. The alphaK result agrees well with Dirac-Fock calculations in which the effect of the K-shell atomic vacancy is accounted for; it extends our precision tests of alphaK calculations to Z = 48, the lowest Z yet measured. However, the result for alphaT disagrees by about two standard deviations from the calculated alphaT value, whether or not the atomic vacancy is included.
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