CROSS-SECTIONS FOR PHOTONUCLEAR REACTIONS

1980 ◽  
pp. 97-107
Author(s):  
V.M. Gorbachev ◽  
Y.S. Zamyatnin ◽  
A.A. Lbov
Keyword(s):  
Cross Sections ◽  
Photonuclear Reactions

Studies of cross-sections of short-halflife isomer states excitation in photonuclear reactions

1998 ◽  
Vol 3 (0) ◽  
pp. 8-10
Author(s):  
Й. З. Беседа ◽  
В. С. Бохінюк ◽  
А. І. Гутій ◽  
А. П. Осипенко ◽  
Н. В. Пащенко ◽  
...  
Keyword(s):  
Cross Sections ◽  
Photonuclear Reactions

THE PHOTONEUTRON CROSS SECTIONS OF Rb87, Zr90, AND Mo92

1953 ◽  
Vol 31 (2) ◽  
pp. 250-261 ◽  
Author(s):  
L. Katz ◽  
R. G. Baker ◽  
R. Montalbetti
Keyword(s):  
Photon Energy ◽  
Cross Sections ◽  
Ground States ◽  
Half Maximum ◽  
Photonuclear Reactions ◽  
Shape Characteristic ◽  
Elementary Analysis ◽  
The Cross

The photoneutron cross sections of the 50-neutron isotopes Rb87, Zr90, and Mo92 have been measured as a function of photon energy. These cross sections exhibit the peaked shape characteristic of photonuclear reactions. Peak values of 0.23, 0.27, and 0.14 barn at 17.5, 18.0, and 18.7 Mev. respectively were found for these nuclei. The widths of all the curves at half maximum were about 6 Mev. In the case of zirconium and molybdenum the cross sections to the isomeric and ground states of the residual nuclei have been determined separately. The ratio of the cross sections, σ ground/σ isomeric, has been examined as a function of photon energy and is discussed in the light of the elementary analysis previously presented.

scholarly journals CROSS-SECTIONS FOR PHOTONUCLEAR REACTIONS 93Nb(γ,n)92mNb AND 93Nb(γ,n)92tNb IN THE END-POINT BREMSSTRAHLUNG ENERGIES 36...91 MeV

2020 ◽  
pp. 148-153
Author(s):  
A.N. Vodin ◽  
O.S. Deiev ◽  
I.S. Timchenko ◽  
S.N. Olejnik ◽  
A.S. Kachan ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Maximum Energy ◽  
Reaction Cross ◽  
Bremsstrahlung Spectrum ◽  
Photonuclear Reactions ◽  
End Point ◽  
Γ Ray ◽  
First Time ◽  
Good Agreement

The flux-weighted averaged over the energy range of bremsstrahlung spectrum from reaction threshold up to the maximum energy of γ-ray cross-sections <σ(E)> of the 93Nb(γ,n)92mNb and 93Nb(γ,n)92tNb photonuclear reactions were determined by the gamma-activation method within the end-point bremsstrahlung energies Еmax = 36…91 MeV. Activation of 93Nb targets has been done by a bremsstrahlung flux using an electron beam at the linear accelerator LUE-40 at RDC "Accelerator" NSC KIPT. The γ-ray spectra of irradiated targets were registered using the HPGe detector with an energy resolution of 1.8 keV for the 1332 keV line 60Co. To control the bremsstrahlung flux we used natMo witness-targets and a reaction cross-section of 100Mo(γ,n)99Mo. Obtained experimental cross-sections <σ(E)> of the studied reactions are in good agreement with the theoretical values calculated within TALYS 1.9 code and the results of other authors. The averaged cross-sections <σ(E)> of the 93Nb(γ,n)92mNb and 93Nb(γ,n)92tNb reactions in the energy range 35...45 MeV and > 70 MeV were obtained for the first time.

Integral cross sections of photonuclear reactions near the giant dipole resonance

Atomic Energy ◽  
2000 ◽  
Vol 88 (5) ◽  
pp. 408-413 ◽  
Author(s):  
A. G. Belov ◽  
Yu. P. Gangrskii ◽  
K. K. Gudima ◽  
P. Zuzaan
Keyword(s):  
Cross Sections ◽  
Giant Dipole Resonance ◽  
Photonuclear Reactions ◽  
Dipole Resonance

scholarly journals CROSS-SECTIONS IN PHOTONUCLEAR REACTIONS WITH MULTIPLE NEUTRON EMISSION

2019 ◽  
pp. 144-148
Author(s):  
O.A. Bezshyyko ◽  
O.M. Vodin ◽  
L.O. Golinka-Bezshyyko ◽  
A.V. Kotenko ◽  
V.A. Kushnir ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Cross Sections ◽  
Neutron Emission ◽  
Reaction Cross ◽  
Photonuclear Reactions ◽  
Level Densities ◽  
Relative Contribution ◽  
Dipole Resonance ◽  
Talys 1.8 Code ◽  
Reaction Cross Sections

The energy dependence of the reaction cross-sections A(γ,xn)(A-xn) was studied in the energy range 19...70 MeV, i.e. beyond Great Dipole Resonance (GDR) region. Experimental data were taken from international database EXFOR for range of nuclear mases (55 < A < 209). Theoretical values of cross sections were obtained using TALYS-1.8 code. Several models of level densities with both enabled and disabled pre-equilibrium mechanism were considered in our simulations. Obtained results let us to make conclusions about different mechanisms of photonuclear reactions on certain nuclei, energy dependence of their relative contribution.

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