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Mössbauer spectroscopy on Fe impurities in diamond

Published online by Cambridge University Press:  15 July 2004

G. Weyer ,
H. P. Gunnlaugsson ,
M. Dietrich ,
H. Fynbo  and
K. Bharuth-Ram
G. Weyer*
Affiliation:
Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark EP Division, CERN, CH-1211 Geneva 23, Switzerland
H. P. Gunnlaugsson
Affiliation:
Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
M. Dietrich
Affiliation:
EP Division, CERN, CH-1211 Geneva 23, Switzerland
H. Fynbo
Affiliation:
Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
K. Bharuth-Ram
Affiliation:
School of Physics, University of Natal, Durban 4041, South Africa
*
[email protected]
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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 $\beta^-$-decay. Thus the Fe isomer shifts in both lattice sites have been determined.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 27 , Issue 1-3: Tenth International Conference on Defects: Recognition, Imaging and Physics in Semiconductors (DRIP X) , July 2004 , pp. 317 - 320
Copyright
© EDP Sciences, 2004

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