Large-q neutron inclusive-scattering data from liquid 4He
We report dynamical calculations for large- q structure functions of liquid 4 He at T = 1.6 and 2.3 K and compare those with recent MARI data. We extend those calculations far beyond the experimental range q <~ 29 Å − 1 in order to study the approach of the response to its asymptotic limit for a...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1998 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/10461 |
| Acceso en línea: | https://hdl.handle.net/2445/10461 |
| Access Level: | acceso abierto |
| Palabra clave: | Heli líquid Dispersió de neutrons Liquid helium Neutrons scattering |
| Sumario: | We report dynamical calculations for large- q structure functions of liquid 4 He at T = 1.6 and 2.3 K and compare those with recent MARI data. We extend those calculations far beyond the experimental range q <~ 29 Å − 1 in order to study the approach of the response to its asymptotic limit for a system with interactions having a strong short-range repulsion. We find only small deviations from theoretical 1 / q behavior, valid for smooth V . We repeat an extraction by Glyde et al. of cumulant coefficients from data which are invariably very well reproduced. We argue that fits determine the single atom momentum distribution, but express doubt as to the extraction of meaningful final state interaction parameters. |
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