Diffusion spin echo decay by pulsed magnetic field gradient NMR and some structure features in blockcopolymer solutions

1985 ◽  
Vol 14 (3-4) ◽  
pp. 355-359
Author(s):  
F. A. Grinberg ◽  
V. D. Scirda ◽  
N. F. Fatkullin ◽  
A. I. Maklakov ◽  
L. Z. Rogovina ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Spin Echo ◽  
Magnetic Field Gradient ◽  
Pulsed Magnetic Field

Notizen: Fluorine Diffusion and Phase Transition in Superionic Conductor KSn2F5 as Studied by 19F NMR, Electrical Conductivity and DSC

1983 ◽  
Vol 38 (5) ◽  
pp. 593-594 ◽  
Author(s):  
W. D. Basler ◽  
I. V. Murin ◽  
S. V. Chernov
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Activation Energy ◽  
Electrical Conductivity ◽  
Relaxation Time ◽  
Field Gradient ◽  
Magnetic Field Gradient ◽  
Pulsed Magnetic Field ◽  
19F Nmr ◽  
Sharp Transition

The diffusion of fluorine in KSn2F5 has been studied by T1 and T2 relaxation time measurements of 19F NMR (200-500 K) and pulsed magnetic Field gradient tech­niques (390-480 K). Near 423 K a sharp transition into the superionic state has been found, the fluorine diffusion increasing by a factor of 4 within a range of 3 K. Conduc­tivity measurements only show a change in the activation energy.

An alternating pulsed magnetic field gradient apparatus for NMR self-diffusion measurements

1982 ◽  
Vol 49 (3) ◽  
pp. 411-424 ◽  
Author(s):  
Mirko I Hrovat ◽  
Chester O Britt ◽  
Tony C Moore ◽  
Charles G Wade
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
Magnetic Field Gradient ◽  
Pulsed Magnetic Field ◽  
Self Diffusion

ALGORITHM FOR THE EVALUATION OF THE SELF-DIFFUSION COEFFICIENT OF SMALL MOLECULES, USING THE NMR MAGNETIC FIELD GRADIENT METHOD

2002 ◽  
Vol 16 (19) ◽  
pp. 2875-2884 ◽  
Author(s):  
M. TODICA ◽  
A. V. POP
Keyword(s):  
Magnetic Field ◽  
Diffusion Coefficient ◽  
Small Molecules ◽  
Field Gradient ◽  
Spin Echo ◽  
Magnetic Field Gradient ◽  
Pure Water ◽  
The Self ◽  
Self Diffusion ◽  
Self Diffusion Coefficient

Different methods of investigation of the spin-echo attenuation, in the NMR pulsed field gradient experiments, were analyzed in order to optimize the measurements of the self-diffusion coefficient of the small molecules of simplest liquids. A particular algorithm of representation of the experimental data is proposed in order to eliminate the effect of the residual gradient. This algorithm, tested for pure water, give results in accord with the literature.

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