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Registration Number

0222U001576, 0116U004450 , R & D reports

Title

The study of nuclear fission in the low energy region, the development of new methods of detection of fission products and the study the physical processes in the beams of ions

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Head

Денисов Віталій Юрійович,

Registration Date

28-01-2022

Organization

Institute for Nuclear Research of NAS of Ukraine

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 In Section 1, the isoscalar dipole response of heavy spherical nuclei in the low-energy region in a semiclassical model based on the explicit solution of the linearized Vlasov kinetic equation for finite Fermi systems is studied. It is found that the isoscalar dipole force function has three resonant structures in the energy range up to 15 MeV. In Section 2, the interaction energies of two uniformly charged spheroids are calculated using numerical methods. The solution is presented in the form of three programs: SPP, CoaxSpSp, ComSPSP. Section 3 investigates the effect of nuclear optical potential on the cross-sections of deuterons and their components at barrier energies and proposes a nuclear optical potential model in which the potential of deuteron interaction with the target nucleus in the convolution model is expressed as the sum of neutron and proton nuclear optical potential. Section 4 investigates the features of determining the spectra of gamma quanta when irradiating nuclei with fast neutrons, taking into account the scattering of neutrons to thermal energies (in indoor experiments). Section 5 presents the experimental results, in which the weighted average yields of nuclear reactions 179Hf (γ, γ ') 179Hfm2 and 180Hf (γ, γ') 180Hfm at the limit energy of inhibitory γ-quanta 17.5, 20, 37, and 55 MeV were measured for the first time. Section 6 examines the characteristics of a universal preamplifier for germanium gamma detectors. It is shown that the use of a power supply circuit based on a current source with a bipolar transistor allows obtaining a resolution of 1.94 keV, and a simplified power supply circuit provides a resolution of only 2 keV. Section 7 investigates the problems of designing technical means of control over the parameters of charged particles of low and ultralow energy. The basic regularities of development of designs of technical means of measurements of parameters of low-energy charged particles are defined.

Product Description

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Ivanov Yuriy V.
Babak Olexandr
Bondarenko Yevgeniya V
Bondarkov Dmytro M
Davidovskaya Oksana Ivanivna
Zheltonozhsky Viktor
Kovalinska Tetiana V.
Kolokolnikova Valentina P.
Kravchenko Oksana S
Kulich Nadiya Vladislavivna
Margitych Tetyana
Myznikov Dmutro Ye.
Mykytiuk Taras V.
Mykhailiuk Vadym Petrovych
Nesterov Vasily Olexandrovich
Onipchenko Maria T
Parkhitko Yuliia M.
Petrosyan Eduard Ye.
Pliuiko Volodymyr A
Savrasov Andriy Mukolayovuch
Sadovnikov Leonid V
Sakhno Victor I.
Tretyak Volodymyr I
Khomenkov Volodymur Petrovuch
Chaplynskyi Roman Yuryevych

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2022-03-09