Effective variation of hyperfine interaction as a result of collective excitation of nuclei
Labushkin V. G., Sarkisyan V. A.
A shift of the Mossbauer lines in the absorption spectrum of a perfect 57FeB03 crystal was observed experimentally when the Bragg condition was satisfied. This shift is attributable to a variation of the hyperfine splitting of collective nuclear levels as a result of interaction of resonance γ radiation with the crystal.