Neutron Compton scattering as a molecular characterization technique: A study on NaHF{sub 2}
- Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Sezione di Firenze, via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence (Italy)
- Dipartimento di Fisica and Centro NAST, Universita degli Studi di Roma 'Tor Vergata', via della Ricerca Scientifica 1, 00133 Rome (Italy)
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom)
Inelastic neutron scattering experiments were performed at intermediate and high momentum transfers, up to 85-90 A ring {sup -1}, to study the proton momentum distribution in polycrystalline sodium hydrogen fluoride (NaHF{sub 2}) at low temperature (below 5 K). The H mean kinetic energy was extracted and compared to the results from hydrogen-projected density of phonon states derived from intermediate momentum transfer inelastic neutron scattering and lattice dynamics simulations. A reasonable agreement between the two figures was found. In addition, relevant aspects of high momentum transfer neutron scattering from NaHF{sub 2} were explored in detail, ranging from an alternative evaluation of final state effects to the role played by the instrumental resolution and to the possibility to reconstruct the potential felt by a proton from its momentum distribution.
- OSTI ID:
- 21052748
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 76, Issue 17; Other Information: DOI: 10.1103/PhysRevB.76.174206; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPTON EFFECT
DENSITY
HYDROFLUORIC ACID
HYDROGEN
INELASTIC SCATTERING
KINETIC ENERGY
MOMENTUM TRANSFER
NEUTRON DIFFRACTION
NEUTRON REACTIONS
NEUTRONS
PHONONS
POLYCRYSTALS
PROTONS
SIMULATION
SODIUM COMPOUNDS
TEMPERATURE RANGE 0000-0013 K