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http://hdl.handle.net/2445/10459
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DC Field | Value | Language |
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dc.contributor.author | Fabrocini, A. | cat |
dc.contributor.author | Vichi, L. | cat |
dc.contributor.author | Mazzanti Castrillejo, Ferran | cat |
dc.contributor.author | Polls Martí, Artur | cat |
dc.date.accessioned | 2009-12-23T12:30:45Z | - |
dc.date.available | 2009-12-23T12:30:45Z | - |
dc.date.issued | 1996 | cat |
dc.identifier.issn | 0163-1829 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/10459 | - |
dc.description.abstract | 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. | - |
dc.format.extent | 11 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | cat |
dc.relation | http://dx.doi.org/10.1103/PhysRevB.54.10035 | - |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.54.10035 | cat |
dc.relation.ispartof | Physical Review B, 1996, vol. 54, núm. 14, p. 10035-10045 | cat |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevB.54.10035 | - |
dc.rights | (c) The American Physical Society, 1996 | cat |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Heli líquid | cat |
dc.subject.classification | Termodinàmica | cat |
dc.subject.classification | Teoria quàntica | cat |
dc.subject.other | Líquid helium | eng |
dc.subject.other | Thermodynamics | eng |
dc.subject.other | Quantum theory | eng |
dc.title | A microscopic approach to the response of 3He-4He mixtures | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 128818 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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128818.pdf | 223.9 kB | Adobe PDF | View/Open |
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