Disentangling the O-16 cross section using light water and heavy water benchmark assemblies
Result description
Fast neutron leakage spectra from the light and heavy water sphere of 30 cm in diameter with neutron source in its centre were measured by a stilbene scintillation detector in the region of 1-10 MeV in the distance of 85 cm from the spheres surface. We use the light and heavy water to eliminate the effect of hydrogen. Cf-252 with the approximate emission rate of 5.5E8 n/s was used as a neutron source for all measurements involved and was placed in the centres of the spheres. The measured neutron spectra are compared with MCNP transport code calculations in ENDF/B-VII.0, ENDF/B-VIII.b4 and JENDL-4 nuclear data libraries. Experimental results for both cases follows similar trend. The best agreement is achieved with ENDF/B-VIII.b4 library in both cases. All libraries underestimate experimental measurement in the region of 3-4 MeV. Furthermore, JENDL-4 library overestimates experiment in the region of 4-6.5 MeV. In addition, we performed cross section sensitivity analysis for elastic, inelastic and (n,alpha) reaction in JENDL-4 and ENDF/B-VIII.b4 libraries since they have almost independent evaluations of O-16.
Keywords
cross section measurementleakage neutron spectrumresearch reactorsnuclear scienceneutron flux
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Disentangling the O-16 cross section using light water and heavy water benchmark assemblies
Original language description
Fast neutron leakage spectra from the light and heavy water sphere of 30 cm in diameter with neutron source in its centre were measured by a stilbene scintillation detector in the region of 1-10 MeV in the distance of 85 cm from the spheres surface. We use the light and heavy water to eliminate the effect of hydrogen. Cf-252 with the approximate emission rate of 5.5E8 n/s was used as a neutron source for all measurements involved and was placed in the centres of the spheres. The measured neutron spectra are compared with MCNP transport code calculations in ENDF/B-VII.0, ENDF/B-VIII.b4 and JENDL-4 nuclear data libraries. Experimental results for both cases follows similar trend. The best agreement is achieved with ENDF/B-VIII.b4 library in both cases. All libraries underestimate experimental measurement in the region of 3-4 MeV. Furthermore, JENDL-4 library overestimates experiment in the region of 4-6.5 MeV. In addition, we performed cross section sensitivity analysis for elastic, inelastic and (n,alpha) reaction in JENDL-4 and ENDF/B-VIII.b4 libraries since they have almost independent evaluations of O-16.
Czech name
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Czech description
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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20305 - Nuclear related engineering; (nuclear physics to be 1.3);
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Radiation and Isotopes
ISSN
0969-8043
e-ISSN
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Volume of the periodical
133
Issue of the periodical within the volume
March
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
45-50
UT code for WoS article
000425577300008
EID of the result in the Scopus database
2-s2.0-85038880618
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Nuclear related engineering; (nuclear physics to be 1.3);
Year of implementation
2018