Abilities of Nuclear Quadrupole Resonance

Being practically harmless, NMR is used for the diagnosis of pathology in the human body, particularly for the hard-to-reach parts of the body such as the heart, liver and brain. 

At present, NQR is not used as widely in science and technology as NMR. Nevertheless, many questions can be solved more quickly and easily with NQR than by NMR, not least because this method does not require an external magnetic field and availability of single crystals. NQR measurements are characterized by a high spectral resolution, selectivity and rate. In particular, of current importance is the remote control of air on the presence of different nitrogen compounds by means of NQR. 

Nuclear charge quadrupole moment eQ interacts with the gradient of electrical field, e Qq, defined by an asymmetry parameter, fj it contains information on the molecular structure. These parameters can be determined from experiment. 

The NQR method can also be used in solids and, predominantly, crystals. 

There are four areas of successful investigation electron density studies in molecules, in particular, changes in the orbital occupancy at complexation and substitutions, study of molecular dynamics, in particular, reorientation, rotation of atomic groups, hindered rotation, phase transformation study, revealing and studying defects and mixed crystals investigation. 

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