Progress in the Evaluation and Validation of n+Fe-56,Fe-57 Cross Sections

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F23%3AN0000047" target="_blank" >RIV/26722445:_____/23:N0000047 - isvavai.cz</a>
Result on the web
<a href="https://www.epj-conferences.org/articles/epjconf/abs/2023/10/epjconf_nd2023_12002/epjconf_nd2023_12002.html" target="_blank" >https://www.epj-conferences.org/articles/epjconf/abs/2023/10/epjconf_nd2023_12002/epjconf_nd2023_12002.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/202328412002" target="_blank" >10.1051/epjconf/202328412002</a>

Result language
angličtina
Original language name
Progress in the Evaluation and Validation of n+Fe-56,Fe-57 Cross Sections
Original language description
There has been a continued effort since 2019 within the IAEA INDEN collaboration to improve the evaluation of neutron induced reactions on iron isotopes. The reason for the 30% underestimation of the neutron leakage spectrum from a thick iron sphere was found primarily to be due to the overestimation of the inelastic cross sections in the Fe-56 evaluated data file produced within the CIELO project of the OECD/NEA Data Bank. The over-estimation of the neutron flux between the resonances near 300 keV was traced to neglecting the fluctuating nature of the total cross section of Fe-57 in the fast neutron energy range, since the evaluated resolved resonance range of 57Fe extended only up to 190 keV. The added 14 background in the "iron window" below 28 keV is in excellent agreement with the independently evaluated one in the JENDL-5.0 library that included the direct capture component in the evaluation. Performance of the updated Fe-56,Fe-57 evaluations was tested on a set of criticality benchmarks from the ICSBEP Handbook, including the dependence on reflector thickness and on new deep penetration shielding benchmark using a Cf-252(sf) neutron source undertaken at Rez, Czech Republic. Neutron leakage for 43 MeV incident neutrons was also validated.
Czech name
—
Czech description
—

Project
<a href="/en/project/LM2023041" target="_blank" >LM2023041: Czech International Centre of Research Reactors</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
15TH INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY, ND2022
ISBN
—
ISSN
2100-014X
e-ISSN
—
Number of pages
8
Pages from-to
1-8
Publisher name
—
Place of publication
—
Event location
online
Event date
Jul 21, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001006475600139

Similar results(10)