Article (Scientific journals)
Xe-129 nuclear resonance scattering on solid Xe and Xe-129 clathrate hydrate
Klobes, B.; Desmedt, A.; Sergueev, I. et al.
2013In Europhysics Letters, 103 (3), p. 36001-6
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Abstract :
[en] Nuclear inelastic and nuclear forward-scattering experiments utilizing the Xe-129 Mossbauer resonance were performed on solid Xe and enriched Xe-129 clathrate hydrate. The lifetime and energy of the nuclear resonance were determined to be 1.465(72) ns and 39581.30(4) eV, respectively. Nuclear inelastic scattering spectra could be obtained with an instrumental resolution of 0.93(4) meV. Despite low Lamb-Mossbauer factors, Xe specific densities of phonon states were derived for solid Xe and Xe clathrate hydrate. Their reliability was investigated using 1-phonon terms obtained by fixing Lamb-Mossbauer factor values within the applied Fourier-Log decomposition. ABINIT calculations of the density of phonon states in solid Xe supplement the interpretation of the experimental data for fcc Xe and good agreement with published densities of phonon states could be achieved below 4meV. Results for the Xe clathrate hydrate essentially confirm the rattling nature of the Xe guests and indicate that Xe modes do not contribute to lattice dynamics above 6 meV. Copyright (C) EPLA, 2013
Disciplines :
Physics
Author, co-author :
Klobes, B.;  Forschungszentrum Julich, JCNS, JARA FIT, D-52425 Julich, Germany.
Desmedt, A.;  Univ Bordeaux 1, Inst Mol Sci, CNRS, F-33405 Talence, France.
Sergueev, I.;  Forschungszentrum Julich, JCNS, JARA FIT, D-52425 Julich, Germany.
Schmalzl, K.;  Forschungszentrum Julich GmbH, JCNS, Outstn ILL, F-38042 Grenoble, France.
Hermann, Raphael ;  Université de Liège - ULiège
Language :
English
Title :
Xe-129 nuclear resonance scattering on solid Xe and Xe-129 clathrate hydrate
Publication date :
2013
Journal title :
Europhysics Letters
ISSN :
0295-5075
eISSN :
1286-4854
Publisher :
Epl Association, European Physical Society, Mulhouse, France
Volume :
103
Issue :
3
Pages :
36001-6
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
French "Agence Nationale de la Recherche" [ANR 2011-JS08-002-01]
Helmholtz Gemeinschaft [NG-407]
Commentary :
We acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities and we thank A. CHUMAKOV (ESRF) and R. SIMON (FZ Julich) for assistance in using beamline ID18. AD acknowledges funding from the French "Agence Nationale de la Recherche" (project ANR 2011-JS08-002-01). RPH acknowledges support from the Helmholtz Gemeinschaft for grant NG-407 "Lattice Dynamic in Emerging Functional Materials".
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