Spectra of high-energy photons following the capture of 14 MeV neutrons by 133Cs, 139La, Ce and 159Tb

Rigaud, F.; Irigaray, J.L.; Petit, G.Y.; Longo, Giuseppe; Saporetti, F.

doi:10.1016/0375-9474(71)90936-5

Cited by 25 publications

(4 citation statements)

References 20 publications

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“…Capture Cross Section Figure 5 illustrates capture cross sections for 133{137 Cs in JENDL-4.0, which are compared with those of the measurements 7,28,32,33,41,[44][45][46][47][48][49][50][51] and of JENDL-3.3, ENDF/B-VII.0 and JEFF-3.1.1. Figure 6 focuses on the present result for 133 Cs in the keV region, whose evaluation was based on the average cross sections derived by Macklin. 44) The JENDL-4.0 data have slightly large cross sections relative to those of Yamamuro et al 46) and Bokhovko et al 47) in the incident energies below 80 keV, above which the influence of inelastic scattering becomes important.…”

Section: Evaluated Results and Discussionmentioning

confidence: 99%

“…Figure 6 focuses on the present result for 133 Cs in the keV region, whose evaluation was based on the average cross sections derived by Macklin. 44) The JENDL-4.0 data have slightly large cross sections relative to those of Yamamuro et al 46) and Bokhovko et al 47) in the incident energies below 80 keV, above which the influence of inelastic scattering becomes important. In the 14-15 MeV region, several measurements were carried out, and cross sections of about 1.5 mb were obtained by Rigaud et al 32) and Wagner and Warhanek.…”

Section: Evaluated Results and Discussionmentioning

confidence: 99%

“…In the adopted formalism of Akkermans and Gruppelaar 31) the -ray emission rate was multiplied by 3.4 to fit the capture cross section for 133 Cs to measured ones 32,33) available at 14-15 MeV incident energies. The fixed value was also applied to the calculations of capture cross sections for the other Cs isotopes.…”

Section: Preequilibrium Modelmentioning

confidence: 99%

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Neutron Nuclear Data Evaluation of Cesium Isotopes for JENDL-4.0

Iwamoto

2011

Journal of Nuclear Science and Technology

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For the development of JENDL-4.0, neutron nuclear data for fission product nuclides, 133;134;135;136;137 Cs, were revised in the incident neutron energy range from 1 eV to 20 MeV by using a coupled-channels optical model (OM), and nuclear reaction models. The OM potential parameters were determined for stable 133 Cs to reproduce the experimental data of total and elastic scattering cross sections and angular distributions of elastically scattered neutrons. The present results reasonably reproduce measured data for (n; 2n), (n; p), (n; ), and capture reactions on 133 Cs. Cs production is marginally consistent with measured data. However, a large discrepancy is recognized for 138m Cs production. The -ray emission data were evaluated with available measurements, and newly compiled in JENDL-4.0. Maxwellian-averaged capture cross sections were calculated in the energy range from 1 to 10 3 keV, and are compared with other derived data.

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Section: Evaluated Results and Discussionmentioning

confidence: 99%

Section: Evaluated Results and Discussionmentioning

confidence: 99%

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Neutron Nuclear Data Evaluation of Cesium Isotopes for JENDL-4.0

Iwamoto

2011

Journal of Nuclear Science and Technology

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“…As described above, the contribution of such neutrons was calculated with the MCNP code, based on the neutron generator model. The validation of this model has been performed by the reaction 159 Tb(n,γ ) 160 Tb, because there is only one experimental value for the mentioned reaction [σ = (1.75 ± 0.45) mb] at a neutron energy around 14 MeV [37]. After correction of our measured cross section by a factor (1-FC), the value (1.8 ± 2.0) mb was obtained.…”

Section: Estimation Of the Error Sourcesmentioning

confidence: 99%

Cross sections for fast-neutron interaction with Lu, Tb, and Ta isotopes

et al. 2010

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The cross sections for (n,x) reactions with Lu, Tb, and Ta isotopes were measured at (d,t) neutron energies around 14 MeV with the activation technique using metal foils of natural composition. Additionally, tantalum samples were irradiated with (d,d) neutrons and filtered neutron beams. To ensure an acceptable precision of the results all major sources of uncertainties were taken into account. Calculations of efficiency and correction factors were performed with the Monte Carlo technique. The cross section results obtained for the 175 Lu(n,α) 172 Tm reaction at (d,t) neutron energies are reported for the first time. 181 Ta(n,γ ) 182 Ta m2 reaction cross sections were also measured for the first time at 1.9, 58.7, and 144.3 keV and at 2.85 MeV. The earlier evaluated cross section upper estimate for the nuclear reaction 159 Tb(n,n α) 155 Eu is reported in this article to be one order lower. Some other cross sections were obtained with higher precision. Theoretical calculations of excitation functions were performed with the TALYS-1.0 code and compared with the experimental cross section values.

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