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Titolo:
Nonexponential primary relaxation in supercooled salol
Autore:
Diezemann, G; Nelson, K;
Indirizzi:
MIT, Dept Chem, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139MIT, Dept Chem, Cambridge, MA 02139 USA
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 20, volume: 103, anno: 1999,
pagine: 4089 - 4096
SICI:
1520-6106(19990520)103:20<4089:NPRISS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLASS-FORMING LIQUIDS; ENERGY LANDSCAPE MODEL; ALPHA-RELAXATION; MOLECULAR-DYNAMICS; LIGHT-SCATTERING; TRANSITION; NMR; REORIENTATIONS; SPECTROSCOPY; DIFFUSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Nelson, K MIT, Dept Chem, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139 , Dept Chem, Cambridge, MA 02139 USA
Citazione:
G. Diezemann e K. Nelson, "Nonexponential primary relaxation in supercooled salol", J PHYS CH B, 103(20), 1999, pp. 4089-4096

Abstract

The nonexponential relaxation in supercooled salol near the calorimetric glass transition temperature is analyzed in terms of a free-energy model forthe primary relaxation in glass-forming liquids. In comparing the results from impulsive stimulated thermal scattering and dielectric data, we estimate the mean angle of reorientational fluctuations in the supercooled liquidfor a temperature range located between the glass transition temperature and the critical temperature of mode coupling analyses on salol. The mean reorientational jump angle is estimated to increase smoothly from about 20 degrees to 50 degrees with increasing temperature in the considered range. These values are in qualitative accord to what was found in other supercooledliquids in a similar range before.

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Documento generato il 26/09/20 alle ore 07:10:41