Temperature dependence of the quadrupolar relaxation rate in liquid metals

1984 ◽  
Vol 105 (1-2) ◽  
pp. 83-87 ◽  
Author(s):  
T. Gaskell ◽  
M.S. Woolfson
Keyword(s):  
Temperature Dependence ◽  
Relaxation Rate ◽  
Liquid Metals ◽  
Quadrupolar Relaxation

TEMPERATURE DEPENDENCE OF QUADRUPOLAR RELAXATION RATE IN LIQUIDS

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-378-C8-380 ◽  
Author(s):  
J. Bosse ◽  
D. Quitmann ◽  
C. Wetzel
Keyword(s):  
Temperature Dependence ◽  
Relaxation Rate ◽  
Quadrupolar Relaxation

Calculation of NQR v's and T1-1' s being proportional to T4 and T5 , respectively

1990 ◽  
Vol 45 (3-4) ◽  
pp. 536-540
Author(s):  
Mariusz Máckowiak ◽  
Costas Dimitropoulos
Keyword(s):  
Temperature Dependence ◽  
Relaxation Rate ◽  
Spin System ◽  
Low Frequency ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Lattice Vibrations ◽  
Spin Lattice ◽  
Simplifying Assumptions ◽  
The One

Abstract The second-order Raman phonon process for a multilevel spin system is shown to give a quadru-polar spin-lattice relaxation rate T1-1varying as T5 at very low temperatures. This relaxation rate for quadrupole spins is similar to the one discussed for a paramagnetic spin system having a multilevel ground state. The temperature dependence of T1 is discussed on the basis of some simplifying assumptions about the nature of the lattice vibrations in the Debye approximation. This type of relaxation process has been observed below 20 K in tetramethylammonium hydrogen bis-trichloroacetate for the 35Cl T1-1 . Below 20 K the NQR frequency in the same crystal reveals a T4 temperature dependence due to the induced modulations of the vibrational and librational coordinates by the low-frequency acoustic phonons.

The Temperature Dependence of the Magnetic Susceptibility of Liquid Metals*

1988 ◽  
Vol 157 (Part_2) ◽  
pp. 587-592 ◽  
Author(s):  
Toshio Itami ◽  
Mitsuo Shimoji ◽  
Kenji Shimokawa
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Liquid Metals

Tracer Impurity Diffusion in Liquid Metals: Zn and Cd in Gallium

1974 ◽  
Vol 29 (6) ◽  
pp. 957-958
Author(s):  
S. J. Larsson ◽  
P.-E. Eriksson
Keyword(s):  
Temperature Dependence ◽  
Diffusion Coefficients ◽  
Liquid Metals ◽  
Impurity Diffusion ◽  
Linear Plot

The diffusion coefficients of 65Zn and 115Cd in liquid Ga have been measured between 27° and 455 °C. The temperature dependence of D can be represented by a linear plot or by an Arrhenius representation with D0=2.1·10-4 cm2/s, Q=1.60 kcal/mol for Zn, and D0=2.3·10-4 cm2/s, Q=1.77 kcal/mol for Cd. An extrapolation to lower temperatures for Zn in Ga connects to the measurements by Belskii et al. The present results imply that for impurity diffusion in liquid Ga the effects of solute mass are more significant than valence effects.

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