We have been testing the theory used to calculate internal-conversion coefficients (ICCs) by making a series of measurements of α values with precision better than ±2%. So far we have measured E3 transitions in three nuclei, Rh, Cd and Cs; and M4 transitions in six nuclei, Sn, Te, Te, Ba, Ir and Pt. Together, these span a wide range of A and Z values. In all cases, the results strongly favor Dirac-Fock calculations in which the final-state electron wave function has been computed in an atomic field that includes the vacancy created by the internal-conversion process.

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http://dx.doi.org/10.1016/j.apradiso.2017.05.021DOI Listing

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