Mössbauer Effect from Coulomb-Excited Levels in Fe57 Lee, Y. K. ; Keaton, P. W. ; Ritter, E. T. ; Walker, J. C. Abstract Publication: Physical Review Letters Pub Date: June 1965 DOI: 10.1103/PhysRevLett.14.957 Bibcode: 1965PhRvL..14..957L