Effects of optical radiation on the Mössbauer spectrum of 151Eu3+: CaF2

We study the changes in the shape of the Mössbauer spectrum for the 21.5 keV transition of 151Eu3+ nuclei in a CaF2 lattice, assuming that a population of the excited electronic state 5D0 is maintained by optical pumping. For a population of the excited state 5D0 of 10%, we determine the magnitude of the changes in the Mössbauer spectrum as 1.9% of the area of the unperturbed spectrum. © 2005 Taylor & Francis Group Ltd