Model-independent analysis of inelastic-neutron-scattering data at high momentum transfer

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.6255· OSTI ID:383245

Andreani, C; Filabozzi, A ^[1]; Pace, E ^[2]; Mayers, J ^[3]

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1. Dipartimento di Fisica e Istituto Nazionale di Fisica della Materia, Universita di Roma ``Tor Vergata,`` Via della Ricerca Scientifica 1, Roma (Italy)
2. Dipartimento di Fisica e Istituto Nazionale di Fisica Nucleare, Universita di Roma ``Tor Vergata,`` Via della Ricerca Scientifica 1, Roma (Italy)
3. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom)

A model-independent procedure is proposed which allows us to obtain the asymptotic scaling function at infinite momentum transfer and a comprehensive assessment of deviations of deep inelastic-neutron-scattering data from a perfect scaling behavior, which are due to the finite values of energy and momentum transfers to the target atom. The procedure is applied to simulated and experimental data on polycrystalline ZrH{sub 2} at {ital T}=20 and 290 K. We observe that the impulse approximation, valid for infinite energy and momentum transfers, is not yet completely reached at the finite momentum transfer values {ital q} of neutron experiments even at {ital q}{approx_equal}60 {ital A}{sup {minus}1}. It is argued that, beyond the specific case of ZrH{sub 2}, this procedure can be used for the description of deep inelastic-neutron scattering from other molecular and atomic systems. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 383245
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
AMBIENT TEMPERATURE
DATA ANALYSIS
DEEP INELASTIC SCATTERING
ENERGY TRANSFER
IMPULSE APPROXIMATION
LINEAR MOMENTUM TRANSFER
NEUTRON PROBES
RESPONSE FUNCTIONS
TEMPERATURE RANGE 0013-0065 K
ZIRCONIUM HYDRIDES