RECOIL IMPLANTATION MÖSSBAUER EXPERIMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD G. Langouche, N.S. Dixon, L. Gettner and S.S. Hanna J. Phys. Colloques, 41 C1 (1980) C1-445 DOI: 10.1051/jphyscol:19801173