Final-state effects in neutron Compton scattering measurements on zirconium deuteride and beryllium

Fielding, A L, Timms, D N, Evans, A C, & Mayers, J (1996) Final-state effects in neutron Compton scattering measurements on zirconium deuteride and beryllium. Journal of Physics : Condensed Matter, 8(38), pp. 7205-7219.

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We report inelastic neutron scattering measurements of the neutron Compton profile, J(y), for Be and for D in polycrystalline ZrD2 over a range of momentum transfers, q between 27 and 178 °A−1. The measurements were performed using the inverse geometry spectrometer eVS which is situated at the UK pulsed spallation neutron source ISIS. We have investigated deviations from impulse approximation (IA) scattering which are generically referred to as final state effects (FSEs) using a method described by Sears. This method allows both the magnitude and the q dependence of the FSE to be studied. Analysis of the measured data was compared with analysis of numerical simulations based on the harmonic approximation and good agreement was found for both ZrD2 and Be. Finally we have shown how (∇2V), where V is the interatomic potential, can be extracted from the antisymmetric component of J(y).

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ID Code: 61045
Item Type: Journal Article
Refereed: Yes
DOI: 10.1088/0953-8984/8/38/022
ISSN: 1361-648X
Copyright Owner: Copyright 1996 Institute of Physics Publishing Ltd.
Deposited On: 02 Jul 2013 01:44
Last Modified: 02 Jul 2013 01:46

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