Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/10459
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dc.contributor.authorFabrocini, A.cat
dc.contributor.authorVichi, L.cat
dc.contributor.authorMazzanti, F.cat
dc.contributor.authorPolls Martí, Arturcat
dc.date.accessioned2009-12-23T12:30:45Z-
dc.date.available2009-12-23T12:30:45Z-
dc.date.issued1996cat
dc.identifier.issn0163-1829cat
dc.identifier.urihttp://hdl.handle.net/2445/10459-
dc.description.abstractCorrelated-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.-
dc.format.extent11 p.cat
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherThe American Physical Societycat
dc.relationhttp://dx.doi.org/10.1103/PhysRevB.54.10035-
dc.relation.isformatofReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.54.10035cat
dc.relation.ispartofPhysical Review B, 1996, vol. 54, núm. 14, p. 10035-10045cat
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevB.54.10035-
dc.rights(c) The American Physical Society, 1996cat
dc.subject.classificationHeli líquidcat
dc.subject.classificationTermodinàmicacat
dc.subject.classificationTeoria quànticacat
dc.subject.otherLíquid heliumeng
dc.subject.otherThermodynamicseng
dc.subject.otherQuantum theoryeng
dc.titleA microscopic approach to the response of 3He-4He mixtureseng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec128818cat
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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