A microscopic approach to the response of 3He-4He mixtures
Correlated-basis-function perturbation theory is used to evaluate the zero-temperature response S(q,ω) of 3 − 4 He mixtures for inelastic neutron scattering, at momentum transfers q ranging from 1.1 to 1.8 A ˚ − 1 . We adopt a Jastrow correlated ground state and a basis of correlated particle-hole a...
| Autores: | , , , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1996 |
| País: | España |
| Recursos: | 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:2445/10459 |
| Acesso em linha: | https://hdl.handle.net/2445/10459 |
| Access Level: | acceso abierto |
| Palavra-chave: | Heli líquid Termodinàmica Teoria quàntica Líquid helium Thermodynamics Quantum theory |
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A microscopic approach to the response of 3He-4He mixturesFabrocini, A.Vichi, L.Mazzanti Castrillejo, FerranPolls Martí, ArturHeli líquidTermodinàmicaTeoria quànticaLíquid heliumThermodynamicsQuantum theoryCorrelated-basis-function perturbation theory is used to evaluate the zero-temperature response S(q,ω) of 3 − 4 He mixtures for inelastic neutron scattering, at momentum transfers q ranging from 1.1 to 1.8 A ˚ − 1 . We adopt a Jastrow correlated ground state and a basis of correlated particle-hole and phonon states. We insert correlated one-particle–one-hole and one- and two-phonon states to compute the second-order response. The decay of the one-phonon states into two-phonon states is accounted for in the boson-boson approximation. The full response is split into three partial components S α β (q,ω), each of them showing a particle-hole bump and a one phonon, δ-shaped peak, which stays separated from the multiphonon background. The cross term S 34 (q,ω) results to be of comparable importance to S 33 (q,ω) in the particle-hole sector and to S 44 (q,ω) in the phonon one. Once the response has been convoluted with the experimental broadening, the computed scattering function is in semiquantitative agreement with recent experimental measurements.The American Physical Society200920091996info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion11 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/10459Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Ingléshttp://dx.doi.org/10.1103/PhysRevB.54.10035Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.54.10035Physical Review B, 1996, vol. 54, núm. 14, p. 10035-10045http://dx.doi.org/10.1103/PhysRevB.54.10035(c) The American Physical Society, 1996info:eu-repo/semantics/openAccessoai:recercat.cat:2445/104592026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
A microscopic approach to the response of 3He-4He mixtures |
| title |
A microscopic approach to the response of 3He-4He mixtures |
| spellingShingle |
A microscopic approach to the response of 3He-4He mixtures Fabrocini, A. Heli líquid Termodinàmica Teoria quàntica Líquid helium Thermodynamics Quantum theory |
| title_short |
A microscopic approach to the response of 3He-4He mixtures |
| title_full |
A microscopic approach to the response of 3He-4He mixtures |
| title_fullStr |
A microscopic approach to the response of 3He-4He mixtures |
| title_full_unstemmed |
A microscopic approach to the response of 3He-4He mixtures |
| title_sort |
A microscopic approach to the response of 3He-4He mixtures |
| dc.creator.none.fl_str_mv |
Fabrocini, A. Vichi, L. Mazzanti Castrillejo, Ferran Polls Martí, Artur |
| author |
Fabrocini, A. |
| author_facet |
Fabrocini, A. Vichi, L. Mazzanti Castrillejo, Ferran Polls Martí, Artur |
| author_role |
author |
| author2 |
Vichi, L. Mazzanti Castrillejo, Ferran Polls Martí, Artur |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Heli líquid Termodinàmica Teoria quàntica Líquid helium Thermodynamics Quantum theory |
| topic |
Heli líquid Termodinàmica Teoria quàntica Líquid helium Thermodynamics Quantum theory |
| description |
Correlated-basis-function perturbation theory is used to evaluate the zero-temperature response S(q,ω) of 3 − 4 He mixtures for inelastic neutron scattering, at momentum transfers q ranging from 1.1 to 1.8 A ˚ − 1 . We adopt a Jastrow correlated ground state and a basis of correlated particle-hole and phonon states. We insert correlated one-particle–one-hole and one- and two-phonon states to compute the second-order response. The decay of the one-phonon states into two-phonon states is accounted for in the boson-boson approximation. The full response is split into three partial components S α β (q,ω), each of them showing a particle-hole bump and a one phonon, δ-shaped peak, which stays separated from the multiphonon background. The cross term S 34 (q,ω) results to be of comparable importance to S 33 (q,ω) in the particle-hole sector and to S 44 (q,ω) in the phonon one. Once the response has been convoluted with the experimental broadening, the computed scattering function is in semiquantitative agreement with recent experimental measurements. |
| publishDate |
1996 |
| dc.date.none.fl_str_mv |
1996 2009 2009 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/10459 |
| url |
https://hdl.handle.net/2445/10459 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevB.54.10035 Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.54.10035 Physical Review B, 1996, vol. 54, núm. 14, p. 10035-10045 http://dx.doi.org/10.1103/PhysRevB.54.10035 |
| dc.rights.none.fl_str_mv |
(c) The American Physical Society, 1996 info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
(c) The American Physical Society, 1996 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
11 p. application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
The American Physical Society |
| publisher.none.fl_str_mv |
The American Physical Society |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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15,81155 |