Disentangling the O-16 cross section using light water and heavy water benchmark assemblies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F18%3AN0000005" target="_blank" >RIV/26722445:_____/18:N0000005 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.apradiso.2017.12.014" target="_blank" >http://dx.doi.org/10.1016/j.apradiso.2017.12.014</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apradiso.2017.12.014" target="_blank" >10.1016/j.apradiso.2017.12.014</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Disentangling the O-16 cross section using light water and heavy water benchmark assemblies

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Disentangling the O-16 cross section using light water and heavy water benchmark assemblies

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Radiation and Isotopes

ISSN

0969-8043

e-ISSN

—

Svazek periodika

133

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

45-50

Kód UT WoS článku

000425577300008

EID výsledku v databázi Scopus

2-s2.0-85038880618