Mössbauer spectroscopy on Fe impurities in diamond

¹ Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
² EP Division, CERN, CH-1211 Geneva 23, Switzerland
³ School of Physics, University of Natal, Durban 4041, South Africa

Corresponding author: Gerd.Weyer@cern.ch

Received: 9 July 2003
Accepted: 9 February 2004
Published online: 15 July 2004

Abstract

Radioactive ⁵⁷Mn⁺ ions have been implanted into a natural diamond held at 300–1100 K for Mössbauer spectroscopy studies on the 14 keV γ-radiation emitted in the decay of the ⁵⁷Fe daughter atoms. The Mn parent isotopes are found to be implanted into defect sites of non-cubic symmetry, which anneal partially with increasing temperature during the ⁵⁷Mn lifetime. This is concluded to lead to their incorporation on substitutional lattice sites. This site is inherited by the majority of the ⁵⁷Fe daughter atoms, however, a sizeable fraction is expelled into interstitial sites owing to the recoil in the nuclear -decay. Thus the Fe isomer shifts in both lattice sites have been determined.