ENDF/B-VIII.0: The 8 th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data

Brown, David; Chadwick, M.B.; Capote, R.; Kahler, Albert C.; Trkov, A.; Herman, M.; Sonzogni, A. A.; Danon, Y.; Carlson, A.D.; Dunn, Michael E.; Smith, David L.; Hale, Gerald M.; Arbanas, Goran; Arcilla, R.; Bates, Cameron; Beck, Belinda R.; Becker, Boris W.; Brown, Forrest B.; Casperson, R. J.; Conlin, Jeremy Lloyd; Cullen, D.E.; Descalle, Marie-Anne; Firestone, R. B.; Gaines, Taylor W.; Guber, K. H.; Hawari, Ayman I.; Holmes, Jesse; Johnson, Timothy D.; Kawano, Toshihiko; Kiedrowski, Brian C.; Koning, A. J.; Kopecky, S.; Leal, L.C.; Lestone, J. P.; Lubitz, C.R.; Damián, José Ignacio Márquez; Mattoon, Caleb; McCutchan, E. A.; Mughabghab, S.F.; Navrátil, Petr; Neudecker, Denise; Nobre, G. P. A.; Noguère, G.; Paris, Mark W.; Pigni, Marco T.; Plompen, A.; Pritychenko, B.; Pronyaev, V.G.; Roubtsov, D.; Rochman, D.; Romano, Paul K.; Schillebeeckx, P.; Simakov, S.P.; Sin, M.; Sirakov, I.; Sleaford, B.; Sobes, Vladimir; Soukhovitskiĩ, E. Sh.; Stetcu, I.; Talou, P.; Thompson, I. J.; Marck, Steven van der; Welser‐Sherrill, L.; Wiarda, Dorothea; White, Morgan Curtis; Wormald, J. L.; Wright, R.Q.; Zerkle, Michael; Žerovnik, Gašper; Zhu, Yuntian

doi:10.1016/j.nds.2018.02.001

Cited by 1,663 publications

(690 citation statements)

References 295 publications

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“…This problem was apparent also in the context of the reactor anomaly in the significant overestimation of the flux in the high energy part [15,33]. As such, we have opted here for the ENDF/B-VIII.0 (ENDF) decay data library [38]. In the latest version, some TAGS results were already incorporated.…”

Section: A Database Selectionmentioning

confidence: 99%

First-forbidden transitions in the reactor anomaly

et al. 2019

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We describe here microscopic calculations performed on the dominant forbidden transitions in reactor antineutrino spectra above 4 MeV using the nuclear shell model. By taking into account Coulomb corrections in the most complete way, we calculate the shape factor with the highest fidelity and show strong deviations from allowed approximations and previously published results. Despite small differences in the ab initio electron cumulative spectra, large differences on the order of several percents are found in the antineutrino spectra. Based on the behaviour of the numerically calculated shape factors we propose a parametrization of forbidden spectra. Using Monte Carlo techniques we derive an estimated spectral correction and uncertainty due to forbidden transitions. We establish the dominance and importance of forbidden transitions in both the reactor anomaly and spectral shoulder analysis. Based on these results, we conclude that a correct treatment of forbidden transitions is indispensable in both the normalization anomaly and spectral shoulder.

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Section: A Database Selectionmentioning

confidence: 99%

First-forbidden transitions in the reactor anomaly

et al. 2019

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“…There is a need of accurate experimental information on fission fragments because the state-of-art evaluated data for many systems at fast-neutron energies [27,28] rely on interpolations and empirical models. This is required, in particular, for the modeling of next generation reactors, such as future Fast Reactors (FR) and Accelerator-Driven Systems (ADS) [29].…”

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confidence: 99%

First Direct Measurement of Isotopic Fission-Fragment Yields of U239

Ramos¹,

Caamaño²,

Lemasson³

et al. 2019

Phys. Rev. Lett.

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A direct and complete measurement of isotopic fission-fragment yields of 239 U has been performed for the first time. The 239 U fissioning system was produced with an average excitation energy of 8.3 MeV in one-neutron transfer reactions between a 238 U beam and a 9 Be target at Coulomb barrier energies. The fission fragments were detected and isotopically identified using the VAMOS++ spectrometer at the GANIL facility. This measurement allows to directly evaluate the fission models at excitation energies of fast neutrons, relevant for next-generation nuclear reactors. The present data, in agreement with model calculations, do not support the recently reported anomaly in the fission-fragment yields of 239 U and confirm the persistence of spherical shell effects in the Sn region at excitation energies exceeding the fission barrier by few MeV.

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“…Deficiencies in version control were observed [28] in the distribution of EPICS2017: different content has been distributed in various instances under the same identifier of EPICS2017, therefore it is impossible to identify EPICS2017 photoelectric cross sections univocally. The cross sections examined in this paper correspond to those available in ENDF format within ENDF/B-VIII.0 [24]; no further versions of these cross sections are mentioned in the ENDF/B-VIII.0 errata [29]. Different versions of photoelectric cross sections were released in ENDL format [25] in January and February 2018, both identically identified as EPICS2017; the latter appears equivalent to the tabulations included in ENDF/B-VIII.0.…”

Section: Epics2017 Cross Sectionsmentioning

confidence: 99%

Evolutions in Photoelectric Cross Section Calculations and Their Validation

Basaglia

Pia

Saracco

2020

IEEE Trans. Nucl. Sci.

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This paper updates and complements a previously published evaluation of computational methods for total and partial cross sections, relevant to modeling the photoelectric effect in Monte Carlo particle transport. It examines calculation methods that have become available since the publication of the previous paper, some of which claim improvements over previous calculations; it tests them with statistical methods against the same sample of experimental data collected for the previous evaluation. No statistically significant improvements are observed with respect to the calculation method identified in the previous paper as the state of the art for the intended purpose, encoded in the EPDL97 data library. Some of the more recent computational methods exhibit significantly lower capability to reproduce experimental measurements than the existing alternatives.

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ENDF/B-VIII.0: The 8 th Major Release of the Nuclear Reaction Data Library with CIELO-project Cross Sections, New Standards and Thermal Scattering Data

Cited by 1,663 publications

References 295 publications

First-forbidden transitions in the reactor anomaly

First-forbidden transitions in the reactor anomaly

First Direct Measurement of Isotopic Fission-Fragment Yields of U239

Evolutions in Photoelectric Cross Section Calculations and Their Validation

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