Measurement of very high threshold reactions using Cf-252 source

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000037" target="_blank" >RIV/26722445:_____/20:N0000037 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0969804320305030" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0969804320305030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apradiso.2020.109355" target="_blank" >10.1016/j.apradiso.2020.109355</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of very high threshold reactions using Cf-252 source

Popis výsledku v původním jazyce

Only neutron spectrum standard is Cf-252 spontaneous fission neutron spectrum. However, the high energy tail of this spectrum is loaded with high uncertainty. To reduce this uncertainty, it is crucial to use validated cross sections with low uncertainty. The explored set of reactions covers Ni-58(n,X)Co-57, Tm-169(n,3n)Tm-167, Au-197(n,3n)Au-195, Bi-209(n,3n)Bi-207 and Bi-209(n,4n)(206) Bi threshold reactions. Measurement of dosimetric Tm-169(n,3n)Tm-162, Bi-209(n,3n)Bi-207 and Bi-209(n,4n)(206) Bi reactions spectral averaged cross sections (SACS) is included in NEA's High Priority Nuclear Data Request List. All these reactions SACS were measured for the first time. All SACS were derived from experimentally determined reaction rates by gamma spectrometry using the same highpurity germanium detector. In the case of Tm-169(n,3n)(167) Tm reaction, the difference between experimental and calculated value using the IRDFF-II library is only 1.45%. Concerning Au-192(n,3n)(195) Au reaction, the reasonable agreement is achieved only using the TENDL-2017 library. In the case of Bi-209(n,3n)Bi-207 reaction, agreement within uncertainty is not achieved with any library unlike Bi-209(n,4n)(206) Bi reaction where the agreement within uncertainty is achieved with IRDFF-II library. The best agreement for Ni-58(n,X)Co-57 reaction is achieved using ENDF/B-VIII library.

Název v anglickém jazyce

Measurement of very high threshold reactions using Cf-252 source

Popis výsledku anglicky

Only neutron spectrum standard is Cf-252 spontaneous fission neutron spectrum. However, the high energy tail of this spectrum is loaded with high uncertainty. To reduce this uncertainty, it is crucial to use validated cross sections with low uncertainty. The explored set of reactions covers Ni-58(n,X)Co-57, Tm-169(n,3n)Tm-167, Au-197(n,3n)Au-195, Bi-209(n,3n)Bi-207 and Bi-209(n,4n)(206) Bi threshold reactions. Measurement of dosimetric Tm-169(n,3n)Tm-162, Bi-209(n,3n)Bi-207 and Bi-209(n,4n)(206) Bi reactions spectral averaged cross sections (SACS) is included in NEA's High Priority Nuclear Data Request List. All these reactions SACS were measured for the first time. All SACS were derived from experimentally determined reaction rates by gamma spectrometry using the same highpurity germanium detector. In the case of Tm-169(n,3n)(167) Tm reaction, the difference between experimental and calculated value using the IRDFF-II library is only 1.45%. Concerning Au-192(n,3n)(195) Au reaction, the reasonable agreement is achieved only using the TENDL-2017 library. In the case of Bi-209(n,3n)Bi-207 reaction, agreement within uncertainty is not achieved with any library unlike Bi-209(n,4n)(206) Bi reaction where the agreement within uncertainty is achieved with IRDFF-II library. The best agreement for Ni-58(n,X)Co-57 reaction is achieved using ENDF/B-VIII library.

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

2020

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

166

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000589093400035

EID výsledku v databázi Scopus

2-s2.0-85089159665