Zobrazeno 1 - 10
of 25
pro vyhledávání: '"T Achibat"'
Publikováno v:
Radiation Effects and Defects in Solids. 137:191-198
A thermally stimulated depolarization current was measured in pure silica glasses and crystalline quartz, after a linear temperature increase under applied electric field, up to 520 K. The depolarization peak at 480 K disappeared after UV illuminatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cb5135ae615ce41308d4780928e531d
https://doi.org/10.1080/10420159508222719
https://doi.org/10.1080/10420159508222719
Publikováno v:
Journal of Physics: Condensed Matter. 7:8077-8088
Quasielastic light scattering (QLS) in the glassy polymer poly(methylmethacrylate) is investigated in the temperature range 12-470 K. Raman spectra were measured in the frequency interval 3-600 cm-1. The detailed temperature dependence of the Raman i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce4e94027c7c2ec96d4feeae59a0a044
https://doi.org/10.1088/0953-8984/7/42/005
https://doi.org/10.1088/0953-8984/7/42/005
Publikováno v:
Journal of Non-Crystalline Solids. 190:258-263
The low-energy excitations of a very fragile glass-former (in the sense of Angell), poly(vinyl chloride), have been studied by low-frequency Raman scattering and by measurements of the low-temperature heat capacity and thermal conductivity. Two diffe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::792f41cdf42beaa09608faef72bd80c1
https://doi.org/10.1016/0022-3093(95)00274-x
https://doi.org/10.1016/0022-3093(95)00274-x
Publikováno v:
The Journal of Chemical Physics. 102:8114-8117
Low frequency Raman and inelastic neutron scattering from glass‐forming aqueous lithium chloride (LiCl,4H2O; LiCl,6H2O) are compared. The measurements were carried out from the vitreous to liquid states. The scattering from anharmonic oscillations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0341793f271ab9f2c48c2e7b8a8b2a38
https://doi.org/10.1063/1.469221
https://doi.org/10.1063/1.469221
Publikováno v:
Philosophical Magazine B. 71:625-632
The frequency dependence of the light-vibration coupling coefficient is related to the random fluctuations of the vibrations in disordered systems. The disorder is described by differentiating between the radial correlation and the angular correlatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efc4c0a6448624876c113be753a7b559
https://doi.org/10.1080/01418639508238551
https://doi.org/10.1080/01418639508238551
Autor:
M. Aboulfaraj, T Achibat, Christian G'Sell, Eugène Duval, Aziz Boukenter, S. Etienne, Alain Mermet
Publikováno v:
Polymer. 36:251-257
The low-frequency Raman scattering (2–200 cm −1 range) of poly(methyl methacrylate) (PMMA) specimens plastically deformed in pure shear is compared to that of non-deformed specimens. The main experimental feature is an excess of Raman scattering
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9875369c0af02060cd67136ac502cbcb
https://doi.org/10.1016/0032-3861(95)91311-t
https://doi.org/10.1016/0032-3861(95)91311-t
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 201:257-262
Comparison between low frequency Raman scattering and inelastic neutron scattering of amorphous polybutadiene shows that the light-vibration coupling coefficient is linearly frequency dependent. This agrees with earlier findings and we show here that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71439ff390cd7f0b624a3c2ba4c3b21c
https://doi.org/10.1016/0378-4371(93)90420-9
https://doi.org/10.1016/0378-4371(93)90420-9
Publikováno v:
The Journal of Chemical Physics. 99:2046-2051
New experimental results of low‐frequency Raman scattering from different glasses are presented. They are compared to the vibration density of states obtained from inelastic neutron scattering to deduce the light‐vibration coupling coefficient C(
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc352894eb3f9a94a4b3f166283899ab
https://doi.org/10.1063/1.465268
https://doi.org/10.1063/1.465268
Publikováno v:
Philosophical Magazine B. 65:181-189
Electron microscopy observations are presented to determine the structure of silica aerogels and the fractal domains. The model of Raman scattering from disordered fractal materials is discussed. The localized acoustic modes in glasses are compared w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e014d5469b3f5afeb849299e24382371
https://doi.org/10.1080/13642819208217895
https://doi.org/10.1080/13642819208217895
Publikováno v:
Journal of Non-Crystalline Solids. 144:145-150
Phosphorus oxynitride glasses prepared by nitriding of sodium phosphate were studied by low-frequency Raman scattering. The aim of this research was to make evident the relation between the structure and disorder, which are changed by nitriding, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c68d20c76ad780e486518bdd4261d7a6
https://doi.org/10.1016/s0022-3093(05)80394-1
https://doi.org/10.1016/s0022-3093(05)80394-1