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arXiv · 1512.06898

Precise measurement of alpha_K and alpha_T for the 150.8-keV E3 transition in 111Cd: Test of internal-conversion theory

N. Nica·J. C. Hardy·V. E. Iacob·T. A. Werke·C. M. Folden III·L. Pineda·M. B. Trzhaskovskaya
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Abstract

We have measured the K-shell and total internal conversion coefficients, alpha_K and alpha_T, for the 150.8-keV E3 transition in 111Cd to be 1.449(18) and 2.217(26) respectively. The alpha_K 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 alpha_K calculations to Z = 48, the lowest Z yet measured. However, the result for alpha_T disagrees by about two standard deviations from the calculated alpha_T value, whether or not the atomic vacancy is included.

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N. Nica, J. C. Hardy, V. E. Iacob, T. A. Werke, C. M. Folden III, L. Pineda, M. B. Trzhaskovskaya. 2015-12-21. Precise measurement of alpha_K and alpha_T for the 150.8-keV E3 transition in 111Cd: Test of internal-conversion theory. https://doi.org/10.1103/physrevc.93.034305

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