14 research outputs found
Cross-sections for the multiparticle reaction at = 40 95 MeV
The bremsstrahlung flux-averaged cross-sections and the cross-sections per equivalent photon
were measured for the
photonuclear multiparticle reaction at bremsstrahlung end-point
energies ranging from 40 MeV to 95 MeV. The experiments were performed using
the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of
the -activation technique. The bremsstrahlung quantum flux was
calculated with the program GEANT4 and, in addition, was monitored by means of
the reaction. The cross-sections
were computed using the TALYS1.9 code with the default options. The
measured average cross-sections
and have appeared to be
higher by factors of 2.0 to 2.4 than the theoretical results. The experimental
results have been found to be in good agreement with the data of other
laboratories. Consideration is given to special features of calculation of
and for the
reaction, with occurrence of
three photodisintegration channels. The paper also discusses
the possibility of using the
reaction for monitoring the bremsstrahlung -quantum flux in the photon
energy region above 30 MeV.Comment: 16 pages, 6 figures, 1 tabl
Magnetic system for cleaning the gamma beam at the LUE-40 electron linac output
The bremsstrahlung of accelerated electrons passing through a converter is
used to study multiparticle photo-nuclear reactions. The results of
calculations, numerical modeling, design, and testing of a special magnetic
cleaning system to obtain a "pure" beam of bremsstrahlung quanta when studying
the cross-sections of such reactions at the LUE-40 linac are presented. The
system is based on commercially available permanent magnets of rectangular
cross-sections. The maximum on-axis field is 0.9 T, which provides sufficient
separation of the electron beam and gamma rays at a distance of more than 90 mm
from the magnet.Comment: 9 pages, 8 figure
Cross-sections for the multichannel reaction with the 28.3 mev difference of the reaction thresholds
The bremsstrahlung flux-averaged cross-sections and the cross-sections per equivalent photon
were first measured for
the photonuclear multichannel reaction
at end-point bremsstrahlung
gamma energies ranging from 35 MeV to 95 MeV. The experiments were performed
with the beam from the NSC KIPT electron linear accelerator LUE-40 with the use
of the -activation technique. The bremsstrahlung quantum flux was
calculated with the program GEANT4.9.2 and, in addition, was monitored by means
of the reaction. The flux-averaged
cross-sections were calculated using the partial cross-section
values computed with the TALYS1.95 code for different level density models.
Consideration is given to special features of calculating the cross-sections
and for the case of the final nucleus
production in the photodisintegration reaction via several
partial channels : .Comment: 8 pages, 9 figures, 1 table, 19 references. arXiv admin note: text
overlap with arXiv:2012.1447
Photoneutron cross-sections for the reactions
The flux-averaged cross-sections for the – reactions have been measured at the end-point bremsstrahlung energies of 80–95 MeV. The experiments were performed by using the beam from the NSC KIPT electron linear accelerator LUE-40 and measuring the residual -ray activities of the reaction products. The theoretical values were computed using the mono-energetic cross-sections from TALYS1.9 code. A comparison between the measured average cross-sections and the theoretical values show good agreement for the – reactions but substantial differences for the and reactions. Isomeric average cross-section ratios of a product produced from the reaction have been obtained. The results have been compared with the literature data and the theoretical values based on TALYS1.9 code
Isomer ratios for product of photonuclear reaction 107Ag(γ, 3n)104m,gAg in the energy region 35 ÷ 40 MeV
The paper deals with the results of isomer ratio calculations for photonuclear reaction at 107Ag with 3 neutrons escape. Bremsstrahlung energies varied within 35 ÷ 40 MeV. The instrumental gamma-ray spectra of irradiated target specimens have been measured with high purity germanium semiconductor spectrometer. The isomer ratio results and dependence of isomer ratios upon maximal bremsstrahlung energy within selected range are obtained
The 7Li(18O, 17O)8Li reaction and the 17O + 8Li potential
This paper deals with the results of isomer ratio measurements for nuclei 110m,gIn and 108m,gIn from photonuclear reactions
113In(γ, 3n)110m,gIn, 115In(γ, 5n)110m,gIn, 115In(γ, 7n)108m,gIn. Bremsstrahlung energies varied within (34÷43) MeV for 113In(γ, 3n)110m,gIn reaction, in energy region (43÷100) MeV for 115In(γ, 5n)110m,gIn and 115In(γ, 7n)108m,gIn reactions. The instrumental gamma-ray spectra of irradiated target specimens have been measured with high purity germanium semiconductor spectrometer. The isomer ratio results and dependence of isomer ratios upon maximal bremsstrahlung energies within selected range are obtained and discussed