Mössbauer spectroscopy on Fe impurities in diamond G. Weyer, H. P. Gunnlaugsson, M. Dietrich, H. Fynbo, K. Bharuth-Ram and the ISOLDE Collaboration Eur. Phys. J. Appl. Phys., 27 1-3 (2004) 317-320 Published online: 15 July 2004 DOI: 10.1051/epjap:2004060