Precise measurement of .ALPHA.K for the 88.2-keV M4 transition in 127Te: Test of internal-conversion theory

  title={Precise measurement of .ALPHA.K for the 88.2-keV M4 transition in 127Te: Test of internal-conversion theory},
  author={Ninel Nica and J. C. Hardy and V.E. Iacob and H. I. Park and Kristyn Brandenburg and M. B. Trzhaskovskaya},
  journal={Physical Review C},
We have measured the K-shell internal conversion coefficient, alpha_K, 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 alpha_K, 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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