Anomalous neutron Compton scattering: Comparison of the convolution approximation with a model-free approach
- Institute of Chemistry, Stranski Laboratory, Technical University Berlin, D-10623 Berlin (Germany)
A shortfall of the scattering intensity from protons has been observed in liquids (water, benzene, etc.) and solids (metal hydrogen systems, organic polymers, etc.) using neutron Compton scattering (NCS). However, the suitability of the conventional NCS data reduction scheme, used to obtain the scattering intensities, based on the convolution approximation (CA) of the nuclear momentum distribution with the instrument resolution function has been questioned. In the present work the commonly used data reduction scheme is compared to a model-free approach [B. Dorner, J. Neutron Res. (to be published)] that is independent of the form of the momentum distribution and the resolution function. Specifically, the ratios of the scattering cross section density of H to C are presented for polyethylene. The model-free approach is shown to lead to the same results as for experimental data published earlier and treated with the CA thus addressing a great part of the previous comments.
- OSTI ID:
- 20719782
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 17; Other Information: DOI: 10.1103/PhysRevB.72.174117; (c) 2005 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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