Measurement of Nuclear Quadrupole Interactions using Mössbauer Spectroscopy

1996 ◽  
Vol 51 (5-6) ◽  
pp. 368-372 ◽  
Author(s):  
Desmond C. Cook
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Electric Quadrupole ◽  
Quadrupole Coupling Constant ◽  
Quadrupole Moments ◽  
Quadrupole Interactions ◽  
Mößbauer Spectroscopy ◽  
Nuclear Quadrupole Interactions ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract Mössbauer spectroscopy is a useful probe for investigating nuclear quadrupole interactions. It enables the magnitude, sign and asymmetry of the electric quadrupole coupling constant to be determined. It is especially important for its ability to measure these parameters for excited nuclear states. The Mössbauer effect is used to measure excited state quadrupole moments in materials whose electric field gradient (EFG) is known. More commonly however, it is used to determine the EFG from which atomic bonding and electronic structure are determined. The technique also allows temperature dependent orientation of sublattice magnetization to be measured using the direction of the electric quadrupole coupling as a reference.

Conformational Analysis of Chloromethylenimine and its Hydrogen-Bonded Dimers with Water from the Study of Nuclear Quadrupole Interactions

1996 ◽  
Vol 51 (5-6) ◽  
pp. 534-536 ◽  
Author(s):  
N. Sathyan ◽  
V. Santhanam ◽  
J. Sobhanadri
Keyword(s):  
Proton Affinity ◽  
Quadrupole Coupling Constant ◽  
Basis Set ◽  
Coupling Constant ◽  
Quadrupole Interactions ◽  
Nuclear Quadrupole Interactions ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole ◽  
Hydrogen Bonded

Abstract A molecular conformation study on N-Chloromethylenimine and its 1:1 dimeric form with water has been carried out using the ab-initio method at 6-31 G and 6-31 G* basis set. We consider the two most stable conformers of the N-chloromethylenimine -water binary mixture involving double hydrogen bonds. In all cases the proton affinity has been calculated. Each system considered in this work has the nuclear quadrupole interactions of the nitrogen and chlorine resonant nuclei which have been calculated and compared. It is found that the nuclear quadrupole coupling constant for the nitrogen nucleus increases in the hydrogen bonded complexes and decreases for the chlorine nucleus compared to the monomeric values. The influence of proton affinity is reflected in the nuclear quadrupole coupling constant.

Nuclear Quadrupole Interactions of 27Al in Alexandrite Single Crystal

1998 ◽  
Vol 53 (6-7) ◽  
pp. 568-572 ◽  
Author(s):  
T. H. Yeom ◽  
S. H. Choh ◽  
K. S. Hong ◽  
H. Y. Yeom ◽  
Y. H. Park ◽  
...  
Keyword(s):  
Single Crystal ◽  
Asymmetry Parameter ◽  
Quadrupole Coupling Constant ◽  
Coupling Constant ◽  
Experimental Accuracy ◽  
Quadrupole Interactions ◽  
Nuclear Quadrupole Interactions ◽  
Nuclear Quadrupole Coupling Constant ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract In an alexandrite single crystal four sets of NMR spectra for 27Al (I=5/2) were observed in the crystallographic ab, be, and ca planes. The AI (I) center has four magnetically inequivalent Al sites, whereas the AI (II) center has two. The nuclear quadrupole coupling constant and asymmetry parameter of Al(I) and AI(II) in an alexandrite crystal were determined. Within the experimental accuracy, our parameters turned out to have the same values as those of a chrysoberyl crystal.

Ratio of the nuclear quadrupole moments of 99Ru by mössbauer spectroscopy

1973 ◽  
Vol 20 (1) ◽  
pp. 130-132 ◽  
Author(s):  
T.C. Gibb ◽  
R. Greatrex ◽  
N.N. Greenwood ◽  
D.C. Puxley ◽  
K.G. Snowdon
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Quadrupole Moments ◽  
Mößbauer Spectroscopy ◽  
Nuclear Quadrupole ◽  
Nuclear Quadrupole Moments

scholarly journals NMR Detection of Oxygen Isotopes in TiO2 Single Crystal

1998 ◽  
Vol 53 (6-7) ◽  
pp. 305-308
Author(s):  
M. Tanigaki ◽  
S. Takeda ◽  
K. Matsuta ◽  
Y. Matsumoto ◽  
T. Minamisono ◽  
...  
Keyword(s):  
Single Crystal ◽  
Quadrupole Moment ◽  
Oxygen Isotopes ◽  
Electric Quadrupole ◽  
Coupling Constants ◽  
Quadrupole Moments ◽  
Quadrupole Interactions ◽  
Quadrupole Coupling ◽  
Nmr Signals

Abstract We studied the electric quadrupole interactions of Oxygen isotopes in a TiO2 single crystal. For 13O and 19O nuclei, quadrupole coupling constants were measured by the β-NMR technique, and for the 17O nucleus the FT-NMR technique was utilized. We synthesized a TiO2 single crystal which was enriched in 17O up to 5 atom % to observe NMR signals without any perturbations from impurities. Using the known quadrupole moment of 17O, EFGs at an O site in TiO2 and the quadrupole moments of 13O and 19O were determined.

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