The CIELO collaboration: Progress in international evaluations of neutron reactions on Oxygen, Iron, Uranium and Plutonium

Chadwick, M.B.; Capote, R.; Trkov, A.; Kahler, Albert C.; Herman, M.; Brown, David; Hale, Gerald M.; Pigni, Marco T.; Dunn, Michael E.; Leal, L.C.; Plompen, A.; Schillebeeck, P.; Hambsch, F.‐J.; Kawano, Toshihiko; Talou, P.; Jändel, M.; Mosby, S.; Lestone, J. P.; Neudecker, Denise; Rising, Michael Evan; Paris, Mark W.; Nobre, G. P. A.; Arcilla, R.; Kopecky, S.; Giorginis, G.; Cabellos, Ó.; Hill, Ian; Dupont, E.; Danon, Y.; Jing, Q.; Zhigang, Ge; Tingjin, Liu; Lu, Haijiao; Ruan, Xichao; Haicheng, W.; Sin, M.; Bauge, E.; Romain, P.; Morillon, B.; Noguère, G.; Jacqmin, R.; Bouland, O.; Jean, C. De Saint; Pronyaev, V.G.; Ignatyuk, A.V.; Yokoyama, Kenji; Itō, Makoto; Fukahori, Tokio; Iwamoto, Nobuyuki; Iwamoto, Osamu; Kuneada, S.; Lubitz, C.R.; Palmiotti, G.; Salvatores, M.; Kodeli, I.; Kiedrowski, Brian C.; Roubtsov, D.; Thompson, I. J.; Quaglioni, Sofia; Kim, H.I.; Lee, Y.O.; Koning, A. J.; Carlson, A.D.; Fischer, U.; Sirakov, I.

doi:10.1051/epjconf/201714602001

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…Concerning the 235 U neutron-induced fission cross-section, below 150 keV this cross section is only included as Standard at the thermal point and recently its integral value between 7.8 eV and 11 eV [1]. The resolved resonance region, spanning up to 2.25 keV, has been re-evaluated in this energy range with high resolution in the last ENDF/B-VIII release [2] and a SAMMY resonance analysis was done by L. Leal et al [3] after including the work of Paradela el al., presented at WONDER-2015 [4], and taken into account the IAEA Reference file. This result of L. Leal has been included in the last up-dating version ,…”

Section: Introductionmentioning

confidence: 99%

High-resolution evaluation of the U5(n,f) cross section from 3 keV to 30 keV

et al. 2019

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235 U neutron-induced fission cross-section is commonly used as reference for determining other isotope fission cross-section. However, below 150 keV this cross section is only included as Standard at the thermal point and recently its integral value between 7.8 eV and 11 eV [1]. The resolved resonance region, spanning up to 2.25 keV, has been reevaluated with high resolution in the last ENDF/B-VIII release [2] and a SAMMY resonance analysis was done by L. Leal et al. [3] including the CERN-nTOF experimental work of Paradela el al. [4] up to 10 keV, taken into account the IAEA Reference file.In this work the 235 U(n,f) low-background and high-resolution experimental data obtained at the CERN-nTOF facility is combined with previous high-resolution experimental data, in order to produce a very fine grid dataset with normalisation to the IAEA Reference file. The extremelyhigh energy calibration required to reproduce the resonance sharp profiles is based on the nTOF DAQ system with a resolution below 0.1% with reference to the 8.78 eV resonance and to the sharp Al(n,g) capture dip at 5.904 keV. The comparison of the so-evaluated profile with the experimental data and with the evaluated ones will be discussed.

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Section: Introductionmentioning

confidence: 99%

High-resolution evaluation of the U5(n,f) cross section from 3 keV to 30 keV

et al. 2019

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“…Next, a look will be taken at what is the performance (i.e. impact on measurement/calculations discrepancy) of three of the most recent and reliable evaluate files: CIELO (aka ENDF/B-VIIIb4) [1] and CIELO-2 (aka JEFF3.3T3) [2], and JENDL-4 [3]. CIELO (Collaborative International Evaluated Library Organization) has provided a new working frame to facilitate evaluated nuclear reaction data advances.…”

Section: Introductionmentioning

confidence: 99%

Cross section covariances: a user perspective

Palmiotti

Salvatores

2018

EPJ Nuclear Sci. Technol.

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This paper makes a brief historical review, from the user point of view, of the impact of the different covariance data made available during this period, then look at today current situation in the different evaluated files, using practical examples. In particular, the performance, in terms of C/E, of two of the most recent and reliable evaluate files, CIELO and CIELO-2, is presented for a set of selected integral experiments. Moreover, this performance is compared for consistency against the uncertainty computed with two of the current most used covariance data (COMMARA-2.0 and COMACV1). A limited number of comparisons are also shown relative to the JENDL-4 data. Of specific interest is the observed difference due separately to the diagonal and off-diagonal (correlations) contributions. Finally, some perspective and future needs are discussed. *

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