Basic research areas
The basic research results for the last 10 years
The precise experimental data on the differential cross-section of nuclear reactions (3Не,d), (α,t), (α,3Не),(d,3Не), (3Не,α) at energies 20-50 MeV of projectile particles have been obtained. The analysis of the data was made by a modified Distorted Waves Born Approximation (DWBA) method, and some spectroscopic characteristics, these are asymptotic normalization coefficients (ANC) and spectroscopic factors (SF) for low lying single-particle states of light nuclei have been obtained.
Among recent works there is a theoretical estimation of the value of astrophysical factor (S-factor) for some reactions important in nuclear astrophysics with proton capture at stellar temperatures with use of the obtained ANCs.
These investigations have been conducted in collaboration with Argonne National Laboratory (USA), Scientific Research Institute of Nuclear Physics at Moscow State University(Russia), Institute of Nuclear Research Ukrainian National Academy of Sciences (Ukraine), Institute of Nuclear Physics of the National Nuclear Centre (Kazakhstan).
A new method of obtaining parameters of bound state Woods-Saxon potential based on using the charge symmetry of nuclear forces has been developed. To prove the validity of the charge symmetry of nuclear force an phenomenologic alpha-cluster model has been proposed. In the framework of the model some new successful formulas to calculate binding energy and radii of nuclei have been found.
The set up for precise measuring cross sections of the reactions induced by accelerated charge particles includes the scattering camber with mechanical devises for measurement at wide range of angles, 2° - 178°, provided with electronics and software for charge particle ΔE-E - identification and spectrometry. The developed set up is used at the beams of cyclotrons U-150 at INP AS of Uzbekistan and INP NNC of Kazakhstan. A new facility is developed for precise measurements for the nuclear reactions of astrophysical relevance both by activation and “prompt” methods at the low-energy accelerators.
On the basis of the neutron generator via T+d→n+α reaction the unique “neutron-induced elastic recoils detection” (NERD) method has been created for determination of content and concentration profiles of all hydrogen isotopes in various materials and mediums, regardless of their aggregative state. The method was used for diagnostic of the elements of the “first wall” and tritium inventory in the research tokamaks. The work was a part of International project on developing the thermonuclear reactor ITER, and it was fulfilled in the framework of International IAEA program.
The high-performance method of activation analysis of the short-lived light radionuclides have been developed at the fast neutron flux. It is based on the spectrometers with HP Ge and scintillation detectors and supplied by the appropriate software with database.