TY - GEN
T1 - Evaluation of the neutron induced reactions on 235U from 2.25 keV up to 30 MeV
AU - Trkov, Andrej
AU - Capote, Roberto
AU - Pigni, Marco T.
AU - Pronyaev, Vladimir G.
AU - Sin, Mihaela
AU - SoGBRhovitskii, Efrem S.
N1 - Publisher Copyright:
© The Authors, published by EDP Sciences, 2017.
PY - 2017/9/13
Y1 - 2017/9/13
N2 - An evaluation of fast neutron induced reactions on 235U is performed in the 2.25 keV-30 MeV incident energy range with the code EMPIRE-3.2 Malta, combined with selected experimental data. The reaction model includes a dispersive optical model potential (RIPL 2408) that couples seven levels of the ground-state rotational band and a triple-humped fission barrier with absorption in the wells described within the optical model for fission. EGSM nuclear level densities are used in Hauser-Feshbach calculations of the compound-nuclear decay. The starting values for the model parameters are retrieved from the RIPL-3 data-base. Excellent agreement is achieved with available experimental data for neutron emission, neutron capture and fission, which gives confidence that the quantities for which there is no experimental information are also predicted accurately. In the fast neutron region of the evaluated file, the fission cross section is taken from Neutron Standards, and neutron capture includes fluctuations observed in recent experiments. Other channels are taken directly from model calculations. New evaluation is validated against ICSBEP criticality benchmarks with fast neutron spectra with excellent results.
AB - An evaluation of fast neutron induced reactions on 235U is performed in the 2.25 keV-30 MeV incident energy range with the code EMPIRE-3.2 Malta, combined with selected experimental data. The reaction model includes a dispersive optical model potential (RIPL 2408) that couples seven levels of the ground-state rotational band and a triple-humped fission barrier with absorption in the wells described within the optical model for fission. EGSM nuclear level densities are used in Hauser-Feshbach calculations of the compound-nuclear decay. The starting values for the model parameters are retrieved from the RIPL-3 data-base. Excellent agreement is achieved with available experimental data for neutron emission, neutron capture and fission, which gives confidence that the quantities for which there is no experimental information are also predicted accurately. In the fast neutron region of the evaluated file, the fission cross section is taken from Neutron Standards, and neutron capture includes fluctuations observed in recent experiments. Other channels are taken directly from model calculations. New evaluation is validated against ICSBEP criticality benchmarks with fast neutron spectra with excellent results.
UR - http://www.scopus.com/inward/record.url?scp=85030470183&partnerID=8YFLogxK
U2 - 10.1051/epjconf/201714602029
DO - 10.1051/epjconf/201714602029
M3 - Conference contribution
AN - SCOPUS:85030470183
T3 - EPJ Web of Conferences
BT - ND 2016
A2 - Siegler, Peter
A2 - Mondelaers, Wim
A2 - Plompen, Arjan
A2 - Hambsch, Franz-Josef
A2 - Schillebeeckx, Peter
A2 - Kopecky, Stefan
A2 - Heyse, Jan
A2 - Oberstedt, Stephan
PB - EDP Sciences
T2 - 2016 International Conference on Nuclear Data for Science and Technology, ND 2016
Y2 - 11 September 2016 through 16 September 2016
ER -