It looks to me like the Bohr-Weisskopf effect does not require electrons in the nucleus, just a magnetic field created by the electron cloud acting on a nucleus with non-uniform magnetic moment distribution.
But, since the nucleus in this case is a perfect sphere, I imagine there would be no hyperfine anomaly term. The energy ratio would be the same as the nucleus in an external, uniform field.
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This topic was modified 9 months, 1 week ago by ajsheffler.