Magnetic Hyperfine Anomaly Measurements Using Nuclear Magnetic Resonance on Oriented Nuclei

Nuclear magnetic resonance on oriented nuclei for (YFe)-Y-91 experiments have been performed. Comparing the external field dependence of resonance frequencies with (YFe)-Y-91 and (YFe)-Y-91m, the hyperfine anomaly in Fe was determined as (91m)Delta(91) = +4.2(8)%. The measured hyperfine anomaly was interpreted in terms of a microscopic theory including core polarization and meson exchange currents.