Attempts to increase the nuclear relaxation time of a3He gas at low temperatures

1988 ◽  
Vol 72 (1-2) ◽  
pp. 165-188 ◽  
Author(s):  
Val�rie Lefevre-Seguin ◽  
Jean Brossel
Keyword(s):  
Relaxation Time ◽  
Low Temperatures ◽  
Nuclear Relaxation

MAGNETIC FIELD DEPENDENT RELAXATION TIME IN p-InSb AT LOW TEMPERATURES

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-689-C5-693
Author(s):  
J. D.N. Cheeke ◽  
G. Madore ◽  
A. Hikata
Keyword(s):  
Magnetic Field ◽  
Relaxation Time ◽  
Low Temperatures ◽  
Field Dependent

Nuclear relaxation time in mixed sodium salts

Physica ◽  
1963 ◽  
Vol 29 (1) ◽  
pp. 50-62 ◽  
Author(s):  
J. Grunzweig ◽  
D. Zamir ◽  
J. Zak
Keyword(s):  
Relaxation Time ◽  
Nuclear Relaxation ◽  
Sodium Salts

Nuclear relaxation ofF19in RbMnF3at very low temperatures

1976 ◽  
Vol 14 (11) ◽  
pp. 4826-4829 ◽  
Author(s):  
M. Twerdochlib ◽  
E. R. Hunt
Keyword(s):  
Low Temperatures ◽  
Nuclear Relaxation

Nuclear Relaxation in SolidHe3at Low Temperatures

1967 ◽  
Vol 163 (1) ◽  
pp. 181-185 ◽  
Author(s):  
E. R. Hunt ◽  
R. C. Richardson ◽  
J. R. Thompson ◽  
R. A. Guyer ◽  
Horst Meyer
Keyword(s):  
Low Temperatures ◽  
Nuclear Relaxation

Glass Transition and Ultrasonic Relaxation in Polystyrene

1996 ◽  
Vol 455 ◽  
Author(s):  
A. Sahnoune ◽  
L. Piché
Keyword(s):  
Molecular Weight ◽  
Relaxation Time ◽  
Glass Transition ◽  
Low Temperatures ◽  
Relaxation Modulus ◽  
Low Molecular Weight ◽  
Relaxation Model ◽  
Fragility Index ◽  
Molecular Weights ◽  
Ultrasonic Relaxation

ABSTRACTWe present measurements of the glass transition and the ultrasonic relaxation modulus in a series of monodisperse polystyrenes. The temperature dependence of the modulus was analyzed using Havriliak-Negami relaxation model (HN) and Vogel-Tammann-Fulcher equation (VTF) for the relaxation time. The results allowed us to determine the fragility index, m, which decreases with increasing molecular weight, Mn. Furthermore, the relaxation time was found to saturate at high molecular weights and varies as Mnp, in the low molecular weight region. The exponent is p≈2 at high temperatures and p ≈ 7 at low temperatures close to Tg.

scholarly journals Temperature-Independent Spin-Lattice Relaxation Time in Metals at Very Low Temperatures

1972 ◽  
Vol 5 (7) ◽  
pp. 2397-2409 ◽  
Author(s):  
F. Bacon ◽  
J. A. Barclay ◽  
W. D. Brewer ◽  
D. A. Shirley ◽  
J. E. Templeton
Keyword(s):  
Relaxation Time ◽  
Low Temperatures ◽  
Lattice Relaxation ◽  
Lattice Relaxation Time ◽  
Spin Lattice Relaxation ◽  
Spin Lattice Relaxation Time ◽  
Spin Lattice

Etude des fluorures et oxyfluorures de chlore ClF5 et ClOF3 liquides par résonance magnétique nucléaire

1974 ◽  
Vol 52 (21) ◽  
pp. 3676-3681 ◽  
Author(s):  
Michel Alexandre ◽  
Paul Rigny
Keyword(s):  
Relaxation Time ◽  
Chemical Shift ◽  
Absorption Line ◽  
Line Shape ◽  
Nuclear Relaxation ◽  
Coupling Constant ◽  
Other Information ◽  
Résonance Magnétique ◽  
The Mean ◽  
Absorption Line Shape

Nuclear relaxation time measurements and interpretations of absorption line shape in ClF5 and ClOF3 allow one to complete data for these compounds. Thus, the chemical shift between non-equivalent fluorine atoms in ClOF3 has been found equal to 50 ± 2 p.p.m. The coupling constant, chlorine 35Cl–fluorine is 192 Hz for the axial fluorine, and less than 20 Hz for the equatorial fluorines. In addition to other information, such as exchange times between fluorine atoms in ClOF3, and the mean coupling constant chlorine–fluorine in ClOF3 and ClF3, is reported.

Fast Dynamics in Glass-Formers: Relation to Fragility and the Kohlrausch Exponent

1996 ◽  
Vol 455 ◽  
Author(s):  
K. L. Ngai ◽  
C. M. Roland
Keyword(s):  
Relaxation Time ◽  
Low Temperature ◽  
Specific Heat ◽  
Raman Spectra ◽  
Low Temperatures ◽  
Coupling Model ◽  
Boson Peak ◽  
Specific Heat Data ◽  
Low Temperature Specific Heat ◽  
Heat Data

ABSTRACTFrom the Raman spectra and related inferences from low temperature specific heat data, Sokolov and coworkers have established that the ratio of the quasielastic and vibrational contributions at low temperatures (5∼10K) up to Tg correlates well with the degree of fragility and β of the glass-former. As pointed out by Sokolov (see his contribution in this Volume) such a correlation between the fast dynamics and structural a-relaxation at Tg(i.e., m and β) is intriguing, since at and below Tg, the α-relaxation time τα is more than twelve orders of magnitude longer than the quasielastic contribution and the boson peak. We show in this paper how the Coupling Model (CM) may provide an explanation for this correlation.

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