Precise measurement of alphaK for the 88.2-keV M4 transition in 127Te: Test of internal-conversion theory
Abstract
We have measured the K-shell internal conversion coefficient, alphaK, for the 88.2-keV M4 transition from the 106-day isomer to the ground state in 127Te to be 484(6). When compared with Dirac-Fock calculations of alphaK, this result agrees well with the version of the theory that incorporates the effect of the K-shell atomic vacancy and disagrees with the one that does not. As a byproduct of this measurement, we have determined the beta branching from the isomer to be 2.14(3)%.
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