Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Francesco Albergamo"'
Autor:
Francesco Albergamo
Publikováno v:
Modern Physics Letters B. 19:135-156
The spectacular properties of liquid helium at low temperature are generally accepted as the signature of the bosonic nature of this system. Particularly the superfluid phase is identified with a Bose–Einstein condensed fluid. However, the relation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3371f614f6df5fe4812c8016ea44dd7
https://doi.org/10.1142/s0217984905008189
https://doi.org/10.1142/s0217984905008189
Publikováno v:
Journal of Low Temperature Physics. 138:31-36
We present neutron scattering measurements of the phonon-roton excitations of superfluid 4He at negative pressures in the porous medium MCM-41. The phonon and maxon energies decrease systematically below bulk values as the density is decreased below
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da36c89f7e9c559480d17a91da8a8a39
https://doi.org/10.1007/s10909-005-1523-9
https://doi.org/10.1007/s10909-005-1523-9
Publikováno v:
Physical Review B. 76
We present neutron scattering measurements of the phonon-roton (P-R) modes of liquid {sup 4}He at saturated vapor pressure confined in 44 A mean pore diameter gelsil in the wave vector range 0.4{
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ee93c1b6de8c919b0f55fb483d8e4d6
https://doi.org/10.1103/physrevb.76.064503
https://doi.org/10.1103/physrevb.76.064503
Autor:
Francesco Albergamo, Eduardo Enciso, M.A. González, M.J. Torralvo, Carlos Cabrillo, C. Carbajo, F. J. Bermejo, Ricardo Fernández-Perea, Claudia Mondelli
Publikováno v:
The European physical journal. Special topics 141 (2007): 35–38.
info:cnr-pdr/source/autori:Gonzalez, MA; Mondelli, C; Cabrillo, C; Fernandez-Perea, R; Bermejo, FJ; Albergamo, F; Enciso, E; Carbajo, C; Torralvo, MJ/titolo:Study of the effects of confinement in the collective excitations of liquid deuterium/doi:/rivista:The European physical journal. Special topics/anno:2007/pagina_da:35/pagina_a:38/intervallo_pagine:35–38/volume:141
info:cnr-pdr/source/autori:Gonzalez, MA; Mondelli, C; Cabrillo, C; Fernandez-Perea, R; Bermejo, FJ; Albergamo, F; Enciso, E; Carbajo, C; Torralvo, MJ/titolo:Study of the effects of confinement in the collective excitations of liquid deuterium/doi:/rivista:The European physical journal. Special topics/anno:2007/pagina_da:35/pagina_a:38/intervallo_pagine:35–38/volume:141
The spectrum of collective excitations of liquid deuterium in the bulk and confined within a MCM-41 matrix having pores of an average diameter of 2.4 nm has been studied by means of neutron scattering and molecular dynamics simulations. The main effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b491350d0d33cc6511d8119a2aa9f463
http://www.cnr.it/prodotto/i/1377
http://www.cnr.it/prodotto/i/1377
Autor:
Gabriel J. Cuello, Didier Zanghi, S. Brassamin, Jean-Francois Brun, Louis Hennet, Viviana Cristiglio, A. Bytchkov, David L. Price, Shankar Krishnan, Marie-Louise Saboungi, Henry E. Fischer, I. Pozdnyakova, Francesco Albergamo
Publikováno v:
Pure and Applied Chemistry
Pure and Applied Chemistry, De Gruyter, 2007, 79 (10), pp.1643-1652. ⟨10.1351/pac200779101643⟩
Pure and Applied Chemistry, De Gruyter, 2007, 79 (10), pp.1643-1652. ⟨10.1351/pac200779101643⟩
Aerodynamic levitation is a simple way to suspend samples which can be heated with CO2 lasers. The advantages of this technique are the simplicity and compactness of the device, making it possible to integrate the device easily into different kinds o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b45cd2014a5e0bc106244cc095afd015
https://hal.archives-ouvertes.fr/hal-02540362
https://hal.archives-ouvertes.fr/hal-02540362
Publikováno v:
Physical Review B. 74
We present neutron-scattering measurements of the momentum distribution of liquid {sup 3}He-{sup 4}He mixtures. The experiments were performed at wave vectors Q, 26{
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00a30b05a0273e0b4bb4bd0414978943
https://doi.org/10.1103/physrevb.74.144503
https://doi.org/10.1103/physrevb.74.144503
Autor:
Ricardo Fernández-Perea, Marie-Louise Saboungi, Vincent Leon, Eduardo Enciso, M.J. Torralvo, F. J. Bermejo, Francesco Albergamo, C. Carbajo, Carlos Cabrillo, Claudia Mondelli, Miguel A. Gonzalez
Publikováno v:
Physical Review B. 73
We present a comparative study of the excitations in bulk and liquid ${\mathrm{D}}_{2}$ confined within the pores of MCM-41. The material (Mobile Crystalline Material-41) is a silicate obtained by means of a template that yields a partially crystalli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce3722a2326af1cdb24703f0aca4fab8
https://doi.org/10.1103/physrevb.73.094206
https://doi.org/10.1103/physrevb.73.094206
Publikováno v:
Physical Review Letters. 92
We present neutron scattering measurements of the phonon-roton excitations of superfluid $^{4}\mathrm{He}$ held at negative pressures from zero to $\ensuremath{-}5\text{ }\mathrm{bar}$. The liquid was stretched to negative pressures by immersing it i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::441f1037d8e84356c7ad1e054d45b993
https://doi.org/10.1103/physrevlett.92.235301
https://doi.org/10.1103/physrevlett.92.235301
Publikováno v:
The European physical journal. E, Soft matter. 12(1)
Liquid (4)He immersed in porous media such as aerogel, Vycor, and Geltech silica are excellent examples of bosons in disorder and confinement. Of special interest is the impact of disorder on Bose-Einstein condensation (BEC), on the elementary excita
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33cdd8e7e4db350b78173836c14eea78
https://pubmed.ncbi.nlm.nih.gov/15007681
https://pubmed.ncbi.nlm.nih.gov/15007681
Autor:
Helmut Schober, Jacques Bossy, Norbert Mulders, Francesco Albergamo, Henry R. Glyde, David R. Daughton
Publikováno v:
Physical Review B. 69
We present neutron-scattering measurements of the excitations of liquid 4 He confined in Vycor glass focussing on wavevectors in the range 1.55 A - 1 ≤Q≤1.80 A - 1 and temperatures around the superfluid-normal fluid critical temperature T c . 4 H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2bab4dc8290d11d21b95e3a27e9c0d4
https://doi.org/10.1103/physrevb.69.014514
https://doi.org/10.1103/physrevb.69.014514