Hf isomer production cross-sections for Ta target irradiated by α-particles in the energy range from 36 to 92 MeV.

Hf isomer production cross-sections were measured when natural tantalum targets were irradiated by alpha particles in the energy range of 36-92 MeV. The simulations of these cross-sections in the TALYS-1.4 code showed that the main contribution to the Hf isomer production is given by (α, αp2n), (α, 3p4n) and (α, Hep3n) nuclear reactions.

Spectroscopy of Radiostrontium in Fuel Materials Retrieved from the Chernobyl Nuclear Power Plant.

Some basic methods of measuring radiostrontium activity by spectroscopic methods are considered in this study. These methods of assessing beta spectra and the characteristic radiation that accompanies the breakdown of radiostrontium are described. The sensitivity of these methods based on the assessments of beta spectra both after radiochemical procedures and without radiochemistry is presented.

Determination of the long-lived Be in construction materials of nuclear power plants using photoactivation method.

The problem of handling nuclear power plant irradiated structural materials holds one of the central places in the nuclear power industry. High toxic Be with a half-life of T = 1.6 × 10 years is discovered in NPP structural materials after reactor operating.

The plutonium isotopes and strontium-90 determination in hot particles by characteristic X-rays.

This paper reports the developed non-destructive methods for the plutonium isotopes and strontium-90 content determination in hot particles and other samples. The proposed methods are based on the measurement of the characteristic X-rays accompanying the decay of these radionuclides. For hot particles of NPP accident origin, the proposed method's error limits are 10-15% for hot particles (samples) with activity above 100 Bq and 15-20% for hot particles (samples) with activity less than 100 Bq.

Method for simultaneous 90Sr and 137Cs in-vivo measurements of small animals and other environmental media developed for the conditions of the Chernobyl exclusion zone.

To perform in vivo simultaneous measurements of the 90Sr and 137Cs content in the bodies of animals living in the Chernobyl Exclusion Zone (ChEZ), an appropriate method and equipment were developed and installed in a mobile gamma beta spectrometry laboratory. This technique was designed for animals of relatively small sizes (up to 50 g). The 90Sr content is measured by a beta spectrometer with a 0.