Published November 1, 2006
| Version v1
Journal article
Dynamics of a hydrogenated silica xerogel: A neutron scattering study
- 1. INFM CRS-SOFT, c/o Universita di Roma 'La Sapienza', 00185 Rome (Italy)
- 2. Dipartimento di Fisica, Universita di Trento, Via Sommarive 14, 38050 Povo, Trento (Italy)
- 3. Institut fuer Festkoerperforschung, Forschungszentrum Juelich, 52425 Juelich (Germany)
Description
Neutron scattering measurements of a hydrogenated vitreous silica (or xerogel) sample reveal an unexpectedly high mean-square displacement of the silanol hydrogen atoms at 150 and 300 K. At 150 K, the spectrum mimics the boson peak of vitreous silica. The finding suggests a large local displacement of the boson peak modes at the breaking points of the continuous random network
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 74
- Journal Issue
- 17
- Journal Page Range
- p. 172304-172304.3
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38026838
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ATOMS; BOSONS; GELS; HYDROGEN; NEUTRON DIFFRACTION; NEUTRON SPECTRA; RANDOMNESS; SILICA
- Descriptors DEC
- COHERENT SCATTERING; COLLOIDS; DIFFRACTION; DISPERSIONS; ELEMENTS; MINERALS; NONMETALS; OXIDE MINERALS; SCATTERING; SPECTRA
Optional Information
- Notes
- (c) 2006 The American Physical Society