Authors & Affiliations

Andreev S.A., Gabbasov D.M., Zatsepin O.V., Namakonov V.V., Sokolov Yu.A., Khatuntsev K.E., Khmelnitsky D.V.
Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics, Snezhinsk, Russia

Andreev S.A. – Head of Department, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Gabbasov D.M. – Engineer-researcher, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Zatsepin O.V. – Head of Department, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Namakonov V.V. – Engineer-researcher, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics. Contacts: post box 245, 13, Vasilyev st., Snezhinsk, Chelyabinsk region, Russia, 456770. Tel.: +7(351)465-11-49; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Sokolov Yu.A. – Leading Researcher, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Khatuntsev K.E. – Researcher, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Khmelnitsky D.V. – Deputy Head of the Department - Head of the Theoretical Laboratory, Cand. Sci. (Phys.-Math.), associate professor, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.

Abstract

Constants of gamma-formation that exist in available libraries of evaluated nuclear data are to be refined. In order to check these constants quality, and where applicable to correct them, it is necessary to conduct corresponding integral experiments. The work presents the results of new integral experiments on measuring spectra and yield of secondary neutrons and gamma-radiation from the samples under the impact of 14 MeV-neutrons for the following materials: V, Al, CH2, Cu, Sn, 238U, Fe, Ti, Mg and Be. Investigated samples of natural isotopic composition were spheres or discs with wall thickness 50 mm, which were located at a distance 50 mm from the center of titan-tritium target. Neutrons with energy 14 MeV were formed in reaction 3H(d,n)4He.
Experiments were performed on neutron generator NG-12I in pulse-periodic regime: pulse duration was 20 n/s, repetitions frequency was 200 kHz, mean neutron yield was ~2·108 s-1. For detector, scintillation detector was used with stilbene crystal. Measurements were made for time-of-flight neutron spectra (resolution was 2 ns/m) in the range of energy 0.6…14 MeV and apparatus spectra of gamma-radiation were in the range 0.2…10 MeV.
Mathematical models of experiments were built, and using Monte-Carlo method and PRIZMA code, numerical modeling was performed, which included modeling a process of radiation registration in a detector.
Comparison was made of computation and experimental spectra of neutrons and gamma radiation.

Keywords
constants of gamma-formation, generator of 14 MeV-neutrons, time-of-flight neutron spectra, apparatus spectrum of gamma-quanta

Article Text (PDF, in Russian)

References

UDC 539.172

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants", 2018, issue 2, 2:16