| dc.creator |
Fabrocini, A. |
|
| dc.creator |
Vichi, L. |
|
| dc.creator |
Mazzanti Castrillejo, Ferran |
|
| dc.creator |
Polls Martí, Artur |
|
| dc.date |
2009-12-23T12:30:45Z |
|
| dc.date |
2009-12-23T12:30:45Z |
|
| dc.date |
1996 |
|
| dc.date.accessioned |
2024-12-16T10:19:53Z |
|
| dc.date.available |
2024-12-16T10:19:53Z |
|
| dc.identifier |
0163-1829 |
|
| dc.identifier |
http://hdl.handle.net/2445/10459 |
|
| dc.identifier |
128818 |
|
| dc.identifier.uri |
http://fima-docencia.ub.edu:8080/xmlui/handle/123456789/10057 |
|
| dc.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. |
|
| dc.format |
11 p. |
|
| dc.format |
application/pdf |
|
| dc.language |
eng |
|
| dc.publisher |
The American Physical Society |
|
| dc.relation |
http://dx.doi.org/10.1103/PhysRevB.54.10035 |
|
| dc.relation |
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.54.10035 |
|
| dc.relation |
Physical Review B, 1996, vol. 54, núm. 14, p. 10035-10045 |
|
| dc.relation |
http://dx.doi.org/10.1103/PhysRevB.54.10035 |
|
| dc.rights |
(c) The American Physical Society, 1996 |
|
| dc.rights |
info:eu-repo/semantics/openAccess |
|
| dc.source |
Articles publicats en revistes (Física Quàntica i Astrofísica) |
|
| dc.subject |
Heli líquid |
|
| dc.subject |
Termodinàmica |
|
| dc.subject |
Teoria quàntica |
|
| dc.subject |
Líquid helium |
|
| dc.subject |
Thermodynamics |
|
| dc.subject |
Quantum theory |
|
| dc.title |
A microscopic approach to the response of 3He-4He mixtures |
|
| dc.type |
info:eu-repo/semantics/article |
|
| dc.type |
info:eu-repo/semantics/publishedVersion |
|