CHALLENGES IN NUCLEAR FISSION: PROMPT NEUTRON AND γ-RAY EMISSION, IMPROVED FISSION CROSS SECTIONS FOR APPLICATIONS AND MODELING

2013 ◽  
Author(s):  
F.-J. HAMBSCH
Keyword(s):  
Cross Sections ◽  
Nuclear Fission ◽  
Prompt Neutron ◽  
Γ Ray

scholarly journals Erratum: Constraining the calculation of U234,236,238(n,γ) cross sections with measurements of the γ -ray spectra at the DANCE facility [Phys. Rev. C 96 , 024627 (2017)]

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
J. L. Ullmann ◽  
T. Kawano ◽  
B. Baramsai ◽  
T. A. Bredeweg ◽  
A. Couture ◽  
...  
Keyword(s):  
Cross Sections ◽  
Γ Ray

Measurement of fission neutron spectrum averaged cross sections of some threshold reactions on europium: small scale production of no-carrier-added 153Sm in a nuclear reactor

2002 ◽  
Vol 90 (2) ◽  
Author(s):  
I. Fatima ◽  
Jamshed H. Zaidi ◽  
Shujaat Ahmad ◽  
M. S. Subhani
Keyword(s):  
Neutron Spectrum ◽  
Cross Sections ◽  
Nuclear Reactor ◽  
Fission Neutron ◽  
Small Scale ◽  
Activation Technique ◽  
Scale Production ◽  
Radiochemical Separations ◽  
Fission Neutron Spectrum ◽  
Γ Ray

SummaryEmploying the activation technique in combination with radiochemical separations and high-resolution γ-ray spectroscopy fission neutron spectrum averaged cross sections were measured for several (

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.

Thin target cross sections for proton-induced formation of radionuclides from lead for Ep≤71 MeV

2001 ◽  
Vol 89 (11-12) ◽  
Author(s):  
J. Kuhnhenn ◽  
U. Herpers ◽  
W. Glasser ◽  
R. Michel ◽  
P. W. Kubik ◽  
...  
Keyword(s):  
Hybrid Model ◽  
Cross Sections ◽  
Spectrum Analysis ◽  
Experimental Measurements ◽  
Improved Method ◽  
Model Calculations ◽  
Thin Target ◽  
Γ Ray ◽  
Threshold Energies

Some new cross sections for proton-induced radionuclide formation from lead are presented. The results extend the previous measurements from about 70 MeV down to threshold energies. Emphasis was placed upon an improved method of γ-ray spectrum analysis which proved to be reliable and effective. The new results are compared with model calculations on the basis of an improved hybrid model of preequilibrium reactions which is able to reproduce the near target products very well. But for more than 6 emitted nucleons, experimental measurements are superior.

Identification of 26-minute Zr-84

1983 ◽  
Vol 61 (4) ◽  
pp. 754-756 ◽  
Author(s):  
Seiichi Shibata ◽  
Paul J. Karol
Keyword(s):  
Cross Sections ◽  
Half Life ◽  
Production Cross ◽  
Isotopic Distribution ◽  
Absolute Abundance ◽  
Spallation Reactions ◽  
Relative Production ◽  
Γ Ray ◽  
The Absolute ◽  
Mev Protons

An unknown γ-ray of energy 112.5 keV was found in zirconium fractions chemically extracted from isotopically enriched molybdenum targets bombarded with 500 and 800 MeV protons. All evidence suggests that the γ-ray is identifiable with the decay of 84Zr to 84Y. A half-life of 25.7 ± 0.5 min was obtained for 84Zr, which is considerably longer than previously reported half-lives. The absolute abundance of the 112.5 keV γ-ray was also determined. Relative production cross sections for 84Zr were calculated using these results and were consistent with the values interpolated from isotopic distribution curves for spallation reactions.

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