Laboratory of nuclear gamma-resonance spectroscopy (created ion 1975)

Objectives: the neutronography/nuclear gamma-resonance studies of the structure/electron structure of the defect (real) crystals.

Main results

• The technique has been developed for selective recording the GR spectra of the nuclear reaction products that allow sounding selectively the microscopic (atom-scale) braking regions for primarily knocked-out atoms
• The problems of GR spectroscopy for tantal-181, possessing super sensitive nuclear parameters with respect to internal fields and seemed to be unachievable to experimenting, have been solved successfully
• Experimental justification to a concept of "thermal peak" has been obtained for solids of various classes. The atom-level description for the ways of interaction and the diffusion parameters for point defects, as well as primary manifestations of phase forming/ordering/disordering under irradiation have been obtained
• Synthesis of the HTSC systems on a base of rareearth elements/bismuth/thallium possessing maximum known temperatures of transition to superconductivity state has been achieved
• The techniques for structure/magnetic neutronography "RAVAR" and neutron radiography "AGAVA" have been created
• The alloy formation and peculiarities in phasestructure transformations under ion/ion-plasma irradiation have been studied. The data on the beryllium influence on the g-a transformations in stainless steels have been obtained. The temperature-temporal conditions for beryllide formation in the sub-surface layers of iron have been determined
• The new phenomenon of radiation-induced stabilisation of ferrite magnetic properties has been revealed. It has been proved with hematite taken as an example that after irradiation by fast neutrons/charged particles high-temperature orientation of magnet moments in the plane (III) is stabilised to 4.2K