scholarly journals Knight shift and the quadrupole interaction in single crystal magnesium

1969 ◽  
Vol 47 (9) ◽  
pp. 1047-1050 ◽  
Author(s):  
P. D. Dougan ◽  
S. N. Sharma ◽  
D. Llewelyn Williams
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Single Crystal ◽  
Quadrupole Interaction ◽  
Knight Shift ◽  
Quadrupolar Interaction ◽  
Temperature Dependent ◽  
Direct Contrast ◽  
Nuclear Magnetic

The nuclear magnetic resonance has been studied in single crystal magnesium at 4.2 °K. The measured values for the Knight shift and quadrupolar interaction are K = (0.1127 ± 0.0005)%, K′ = (0.0004 ± 0.0002)%, e2qQ/h = 324 ± 6 kc/s. Comparison with the results of Rowland reveals the Knight shift to be independent of temperature in direct contrast to the behavior of cadmium, but the quadrupole interaction is strongly temperature dependent.

Nuclear Magnetic Resonance Studies of Liquid Semiconducting Sb-Te Alloys

1984 ◽  
Vol 39 (2) ◽  
pp. 148-151 ◽  
Author(s):  
V. Hinkel ◽  
D. Ploumbidis
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Knight Shift ◽  
Elevated Temperatures ◽  
Strong Dependence ◽  
Alloy System ◽  
Entire Concentration Range ◽  
Magnetic Resonance Studies ◽  
Knight Shifts ◽  
Nuclear Magnetic

Nuclear magnetic resonance studies of 123Sb and 121Sb in the SbxTe1-x liquid alloy system are described. Interest is focussed on the concentration dependence of the Knight shift and the NMR linewidth. Measurements of the Knight shift and linewidth have been carried out over the entire concentration range at elevated temperatures (900-1100) K. Knight shifts of 123Sb and 121Sb, measured to high precision, show hyperfine structure anomaly. Both. Knight shift and linewidth show strong dependence on the alloy concentration and extreme behavior at the concentrations 40 at.% Sb and 50 at.% Sb. respectively. The experimental results are discussed in terms of modes concerning the electronic structure of liquid semiconductors.

Nuclear magnetic resonance studies. III. Rotational isomerism of some C-glucosylflavonoid acetates

1965 ◽  
Vol 18 (5) ◽  
pp. 715 ◽  
Author(s):  
RA Eade ◽  
WE Hillis ◽  
DHS Horn ◽  
JJH Simes
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Steric Hindrance ◽  
Chemical Shifts ◽  
Rotational Isomerism ◽  
Bulky Substituent ◽  
Temperature Dependent ◽  
Magnetic Resonance Studies ◽  
Rotational Isomers ◽  
Nuclear Magnetic

The temperature-dependent variations in the spectra of certain C-glucosyl-flavonoid acetates are attributed to the effect of steric hindrance of bulky substituent groups of the sugar and aromatic moieties on the rate of interconversion of the two rotational isomers present. The differences in the chemical shifts of the protons of the two isomers are attributed to differences in the orientation and position of the acetyl and phenyl groups.

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