Volume 104, Number 1, October 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||15 November 2013|
Nuclear forward scattering by the 68.7 keV state of 73Ge in CaGeO3 and GeO2
1 Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH - D-52425 Jülich, Germany, EU
2 Faculté des Sciences, Université de Liège - B-4000 Liège, Belgium, EU
3 Deutsches Elektronen-Synchrotron - D-22607 Hamburg, Germany, EU
4 Bayerisches Geoinstitut, Universität Bayreuth - D-95440 Bayreuth, Germany, EU
5 Laboratoire de Minéralogie, Université de Liège - B-4000 Liège, Belgium, EU
Received: 2 August 2013
Accepted: 23 September 2013
We measured nuclear forward scattering of synchrotron radiation by the 68.7 keV nuclear resonance of 73Ge with a half-life . The Debye temperatures of CaGeO3 in the wollastonite, garnet and perovskite phases were determined to be 386(20) K, 437(20) K and 507(20) K, respectively, and 309(20) K and 459(11) K for GeO2 in the quartz and rutile phases, respectively. The isomer shift is clearly dependent on the Ge valence but not directly on the coordination geometry. The so far unknown magnetic moment μe of the 68.7 keV excited state of 73Ge is determined to be . Time domain 73Ge Mössbauer spectroscopy with the 68.7 keV resonance is feasible for isomer shift and Debye temperature measurements but so far neither electric quadrupole nor magnetic hyperfine interactions could be observed.
PACS: 76.80.+y – Mössbauer effect; other γ-ray spectroscopy / 21.10.Ky – Electromagnetic moments / 91.60.-x – Physical properties of rocks and minerals
© EPLA, 2013
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.