Cross section of the 232Th(n, f) reaction in the MeV neutron energy region
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F22%3A00358281" target="_blank" >RIV/68407700:21670/22:00358281 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1140/epja/s10050-022-00716-8" target="_blank" >https://doi.org/10.1140/epja/s10050-022-00716-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1140/epja/s10050-022-00716-8" target="_blank" >10.1140/epja/s10050-022-00716-8</a>
Alternative languages
Result language
angličtina
Original language name
Cross section of the 232Th(n, f) reaction in the MeV neutron energy region
Original language description
Accurate cross section of the 232Th(n, f) reaction are demanded in the design of advanced nuclear systems and in the development of fission theory. However, the existing measurement data are relatively sparse comparing with those of the 238U(n, f) reaction, with big uncertainties and obvious discrepancies. Furthermore, analysis shows that systematic deviations exist between the results measured with mono-energetic neutron sources and white neutron sources, which is the main reason for the differences among different evaluation libraries. This work is dedicated to the clarification of this discrepancy. Based on mono-energetic d-d neutron sources and using back-to-back Th/238U samples, cross section of the 232Th(n, f) reaction were measured at 12 energies in the 4.2–11.5 MeV region. Elaborated measures were taken in the measurement procedure including the exchange of the forward and the backward direction of the samples, as well as in the data processing containing the correction of interference fission counts from low-energy neutrons and the detailed Monte Carlo simulations for the determination of detection efficiencies for fission events. In addition, theoretical analysis was also performed using TALYS-1.9 and UNF codes. The present results agree with existing measurement data using white neutron sources, showing that previous cross section of the 232Th(n, f) reaction measured using mono-energetic neutron sources are systematically overestimated on average. The present results are in accordance with the latest measurement data of Michalopoulou et al., which is helpful in the improvement of nuclear data evaluations of the 232Th(n, f) reaction.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
The European Physical Journal A
ISSN
1434-6001
e-ISSN
1434-601X
Volume of the periodical
58
Issue of the periodical within the volume
5
Country of publishing house
DE - GERMANY
Number of pages
9
Pages from-to
1-9
UT code for WoS article
000790249600003
EID of the result in the Scopus database
2-s2.0-85129339623