The CIELO Collaboration: Neutron Reactions on 1H, 16O, 56Fe, 235,238U, and 239Pu

Chadwick, Mark B.; Dupont, E.; Bauge, Eric; Blokhin, A.; Bouland, O.; Brown, David; Capote, Roberto; Carlson, Allan D.; Danon, Yaron; Jean, C. De Saint; Dunn, Michael E; Fischer, Ulrich; Forrest, R.A.; Frankle, S.C.; Fukahori, Tokio; Ge, Z.; Grimes, S. M.; Hale, Gregory A.; Herman, Michel; Ignatyuk, A.V.; Ishikawa, Makoto; Iwamoto, Nobuyuki; Iwamoto, Osamu; Jandel, Marian; Jacqmin, R.; Kawano, Toshihiko; Kunieda, Satoshi; Kahler, Albert C.; Kiedrowski, Brian C.; Kodeli, I.; Koning, Arjan J.; Leal, Luiz C; Lee, Y.O.; Lestone, John; Lubitz, C.R.; MacInnes, Michael; McNabb, D. P.; McKnight, R.D.; Moxon, M.; Mughabghab, Said F.; Noguere, Gilles; Palmiotti, Giuseppe; Plompen, A. J. M.; Pritychenko, Boris; Pronyaev, V.G.; Rochman, Dimitri; Romain, P.; Roubtsov, D.; Schillebeeckx, Peter; Salvatores, Massimo; Simakov, Stanislav; Soukhovitskii, E. Sh.; Sublet, J. C.; Talou, Patrick; Thompson, Ian J.; Trkov, Andrej; Vogt, Ramona; Marck, S. C. van der

doi:10.1016/j.nds.2014.04.002

Cited by 96 publications

(56 citation statements)

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“…They were frist calculated using ENDF/B-VII.1 data, and then with a modified ENDF/B-VII.1 file, which was updated with the current evaluation, the findings of the WPEC SG34 [22] on the neutron multiplicity and CIELO 16 O data [2]. Jezebel and Flattop benchmarks are higher than 1 for ENDF/B-VII.1 and are now lower.…”

Section: Resultsmentioning

confidence: 99%

“…We presented an evaluation of the 239 Pu prompt fission neutron spectrum (PFNS) for incident neutron energies from thermal to 30 MeV, which was submitted to the IAEA Coordinated Research Project on PFNS [1] and is partially implemented in a CIELO test file [2]. Compared to the ENDF/B-VII.1 evaluation [3], (1) recently published experimental data [10,11] were implemented, (2) detailed experimental uncertainties were estimated including uncertainties associated with previously unknown possible biases [13,14], (3) the original Los Alamos model [17] was extended [16], (4) the pre-equilibrium component to the PFNS was considered and (5) the incident energy dependence of important model parameters was included in the model description following [18,19].…”

Section: Discussionmentioning

confidence: 99%

“…For instance, a reliably evaluated 239 Pu PFNS is key to accurately simulate the reactivity of chain reactions in a nuclear reactor. Therefore, significant efforts have been undertaken to provide improved evaluated nuclear data within the framework of an IAEA coordinated research project on PFNS of actinides [1] as well as for the CIELO project [2] and the next release of the ENDF/B-library.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the²³⁹Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Neudecker

Talou

Kawano

et al. 2016

EPJ Web of Conferences

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Abstract. We present a new evaluation of the 239 Pu prompt fission neutron spectrum (PFNS) induced by thermal to 30 MeV neutrons. Compared to the ENDF/B-VII.1 evaluation, this one includes recently published experimental data as well as an improved and extended model description to predict PFNS. For instance, the pre-equilibrium neutron emission component to the PFNS is considered and the incident energy dependence of model parameters is parametrized more realistically. Experimental and model parameter uncertainties and covariances are estimated in detail. Also, evaluated covariances are provided between all PFNS at different incident neutron energies. Selected evaluation results and first benchmark calculations using this evaluation are briefly discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluating the²³⁹Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Neudecker

Talou

Kawano

et al. 2016

EPJ Web of Conferences

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“…The CIELO project (Collaborative International Evaluated Library Organization) [1] selected six highest-priority pilot isotopes to initially be investigated. Besides 1 H, 16 O, 235 U, 238 U and 239 Pu there is 56 Fe which is one of the major construction material of nuclear facilities.…”

Section: Introductionmentioning

confidence: 99%

Inelastic scattering of fast neutrons from⁵⁶Fe

et al. 2017

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Abstract. The inelastic scattering of fast neutrons on 56 Fe was investigated in different manners at the neutron time-of-flight facility nELBE. The scattering cross section was determined via the measurement of the γ -ray production and by means of a kinematically complete double time-of-flight method. In a further measurement the γ -ray angular distribution was determined to correct the measured cross sections for anisotropy. The resulting inelastic scattering cross section determined from the photo production cross sections is in very good agreement with evaluations and previous measurements. In contrast, the result of the double time-offlight measurement is about 10% lower than these data, giving a hint to neutron-γ -ray angular correlations in the process of inelastic neutron scattering.

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“…The (n,α) reactions, in particular, are gas-producing and exothermic ones. The helium gas accumulated in the material will cause [1] serious embrittlement problems. Experimental measurements, however, are rather scanty for 144 Sm(n,α) 141 Nd and 66 Zn(n,α) 63 Ni reactions.…”

Section: Introductionmentioning

confidence: 99%

Cross sections of the ¹⁴⁴Sm(n,α)¹⁴¹Nd and ⁶⁶Zn(n,α)⁶³Ni reactions at 4.0, 5.0 and 6.0 MeV

et al. 2017

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Abstract. Cross sections of the 144 Sm(n,α) 141 Nd and 66 Zn(n,α) 63 Ni reactions were measured at E n = 4.0, 5.0 and 6.0 MeV performed at the 4.5-MV Van de Graaff Accelerator of Peking University, China. A doublesection gridded ionization chamber was used to detect the alpha particles. The foil samples of 144 Sm 2 O 3 and enriched 66 Zn were placed at the common cathode plate of the chamber. Monoenergetic neutrons were produced by a deuterium gas target through the 2 H(d,n) 3 He reaction. The neutron flux was monitored by a BF 3 long counter. Cross sections of the 238 U(n,f) reaction were used as the standard to perform the (n,α) reaction measurement. Present results are compared with existing measurements and evaluations. They are generally in agreement with TALYS-1.6 code calculations. For the 144 Sm(n,α) 141 Nd reaction our measurements support the data of JEF-2.2. For the 66 Zn(n,α) 63 Ni reaction present results support the data of EAF-2010 and TENDL-2015 data.

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The CIELO Collaboration: Neutron Reactions on 1H, 16O, 56Fe, 235,238U, and 239Pu

Cited by 96 publications

References 1 publication

Evaluating the²³⁹Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Evaluating the²³⁹Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Inelastic scattering of fast neutrons from⁵⁶Fe

Cross sections of the ¹⁴⁴Sm(n,α)¹⁴¹Nd and ⁶⁶Zn(n,α)⁶³Ni reactions at 4.0, 5.0 and 6.0 MeV

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The CIELO Collaboration: Neutron Reactions on 1H, 16O, 56Fe, 235,238U, and 239Pu

Cited by 96 publications

References 1 publication

Evaluating the239Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Evaluating the239Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Inelastic scattering of fast neutrons from56Fe

Cross sections of the 144Sm(n,α)141Nd and 66Zn(n,α)63Ni reactions at 4.0, 5.0 and 6.0 MeV

Contact Info

Product

Resources

About

Evaluating the²³⁹Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Evaluating the²³⁹Pu Prompt Fission Neutron Spectrum Induced by Thermal to 30 MeV Neutrons

Inelastic scattering of fast neutrons from⁵⁶Fe

Cross sections of the ¹⁴⁴Sm(n,α)¹⁴¹Nd and ⁶⁶Zn(n,α)⁶³Ni reactions at 4.0, 5.0 and 6.0 MeV