MÖSSBAUER STUDY OF 57Co IMPLANTED IN SILICON AND GERMANIUM G. Langouche, I. Dezsi, J. De bruyn, M. Van Rossum et R. Coussement J. Phys. Colloques, 40 C2 (1979) C2-547-C2-548 DOI: 10.1051/jphyscol:19792189