Neutron cross sections and average resonance parameters of238U for 55- and 144-keV neutrons

1987 ◽  
Vol 62 (3) ◽  
pp. 241-242 ◽  
Author(s):  
L. L. Litvinskii ◽  
V. P. Vertebnyi ◽  
V. A. Libman ◽  
A. V. Murzin
Keyword(s):  
Cross Sections ◽  
Resonance Parameters ◽  
Neutron Cross Sections ◽  
Average Resonance

Total neutron cross sections and average resonance parameters of gold

Atomic Energy ◽  
1994 ◽  
Vol 77 (1) ◽  
pp. 536-539 ◽  
Author(s):  
O. A. Purtov ◽  
L. L. Litvinskii ◽  
A. V. Murzin ◽  
G. M. Novoselov
Keyword(s):  
Cross Sections ◽  
Total Neutron ◽  
Resonance Parameters ◽  
Neutron Cross Sections ◽  
Average Resonance

Neutron capture cross section of 169Tm measured at the CSNS Back-n facility in the energy region from 30 keV to 300 keV

2021 ◽  
Author(s):  
Jie Ren ◽  
xichao ruan ◽  
Wei Jiang ◽  
Jie Bao ◽  
jincheng wang ◽  
...  
Keyword(s):  
Cross Sections ◽  
Energy Region ◽  
Liquid Scintillation ◽  
Spallation Neutron Source ◽  
Capture Cross ◽  
Total Uncertainty ◽  
Resonance Parameters ◽  
R Matrix ◽  
Average Resonance ◽  
Capture Cross Sections

Abstract The capture cross sections of the 169Tm(n, γ) reaction were measured at the back streaming white neutron beam line (Back-n) of the China Spallation Neutron Source (CSNS) using four C6D6 liquid scintillation detectors. To obtain accurate cross sections, the background subtraction, normalization, and correction were carefully taken into consideration in the data analysis. For the resonance at 3.9 eV, the R-matrix code SAMMY was used to determine the resonance parameters with internally normalization method. While the average capture cross sections of 169Tm in the energy range between 30 keV and 300 keV were extracted relative to the 197Au(n, γ) reaction. The measured cross sections of the 169Tm(n, γ) reaction were reported in logarithmically equidistant energy bins with 20 bins per energy decade with a total uncertainty of 5.4%-7.0% in this paper, and described in terms of average resonance parameters by means of a Hauser-Feshbach calculation with fluctuations. Both of the point-wise cross sections and the averge resonance parameters showed fair agreement with the evaluated values of ENDF/B-VIII.0 library in the energy region studied.

Measurement of the total neutron cross sections and resonance parameters of243Cm in the 0.4-66-eV energy region

1981 ◽  
Vol 51 (5) ◽  
pp. 736-738 ◽  
Author(s):  
V. A. Anufriev ◽  
S. I. Babich ◽  
N. G. Kocherygin ◽  
V. M. Lebedev ◽  
S. N. Nikol'skii ◽  
...  
Keyword(s):  
Cross Sections ◽  
Energy Region ◽  
Total Neutron ◽  
Resonance Parameters ◽  
Neutron Cross Sections

Neutron Activation Resonance Integral of 74Ge and 76Ge and Evaluation of the 74Ge keV Neutron Radiative Capture Cross Section and Resonance Integral

1972 ◽  
Vol 50 (17) ◽  
pp. 1978-1986
Author(s):  
M. D. Ricabarra ◽  
R. Turjanski ◽  
G. H. Ricabarra
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Capture Cross Section ◽  
Radiative Capture ◽  
Resonance Integral ◽  
Neutron Resonance ◽  
Capture Cross ◽  
Resonance Parameters ◽  
Radiative Capture Cross Section ◽  
Average Resonance

Values of the reduced activation resonance integral relative to the thermal cross section I′/σ0 of 74Ge and 76Ge were determined relative to gold by measuring cadmium ratios in a reactor spectrum.A lithium-drifted germanium γ-ray spectrometer was used to resolve the activities of the samples.The results for 74Ge are I′/σ0 = 1.514 ± 0.031 and I′ = 0.681 ± 0.123 b with an assumed σ0 = 0.45 ± 0.08 b; for 76GeI′/σ0 = 12.00 ± 0.16 and I′ = 1.992 ± 0.359 with an assumed σ0 = 0.166 ± 0.030 b.The values obtained for I′ are in serious disagreement with the values calculated with neutron resonance parameters and confirm previous results obtained in similar keV average resonance spacing isotopes.Due to this fact a careful evaluation of the keV neutron radiative capture cross section and resonance integral for 74Ge was undertaken.The evaluation and comparison with the experimental value of the resonance integral shows first that for nuclides with an average resonance spacing of keV the unresolved resonance integral has been seriously underestimated in many evaluations, and second that between 10 and 100 keV, resonance integrals calculated with smooth low resolution activation cross sections give a better calculation of neutron captures than that obtained with neutron resonance parameters.

Total neutron cross sections and resonance parameters of175, 176Lu up to 200 eV

1977 ◽  
Vol 42 (6) ◽  
pp. 583-586 ◽  
Author(s):  
S. M. Kalebin ◽  
V. S. Artamonov ◽  
R. N. Ivanov ◽  
G. V. Rukolaine ◽  
T. S. Belanova ◽  
...  
Keyword(s):  
Cross Sections ◽  
Total Neutron ◽  
Resonance Parameters ◽  
Neutron Cross Sections
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