Characterization of the neutron flux on the surface of a liquid water target intended for 18F production
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F21%3AN0000030" target="_blank" >RIV/26722445:_____/21:N0000030 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/00216224:14330/21:00120061
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0969806X21001250" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0969806X21001250</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.radphyschem.2021.109475" target="_blank" >10.1016/j.radphyschem.2021.109475</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Characterization of the neutron flux on the surface of a liquid water target intended for 18F production
Popis výsledku v původním jazyce
18F is an important radioisotope used in nuclear medicine for diagnostic purposes. It is produced most often via 18O (p,n)18F reaction. During its production, the oxygen contained in the H218O molecules placed in the cooled target is irradiated by accelerated protons. The production of each 18F atom is accompanied by anisotropic highenergy neutron emission, which is a problem for ensuring radiation safety. These neutrons are responsible for the high radiation dose in a cyclotron pit during 18F production as well as for activation of cyclotron components or might be responsible even for target material changes due to their high penetration properties. A precise characterization of a neutron field on the surface of the liquid water target, used for 18F production, is presented. The neutron flux characterization is performed both by using large-area activation detectors and stilbene detectors at 1 m from the target in a forward direction. The experiments show significant discrepancies between calculated and measured reaction rates in higher threshold reactions 58Ni(n,x)57Co and 51V (n,alpha)48Sc, confirming that the current neutron production reaction models are not suitable for the characterization of the secondary neutrons leaking from the target.
Název v anglickém jazyce
Characterization of the neutron flux on the surface of a liquid water target intended for 18F production
Popis výsledku anglicky
18F is an important radioisotope used in nuclear medicine for diagnostic purposes. It is produced most often via 18O (p,n)18F reaction. During its production, the oxygen contained in the H218O molecules placed in the cooled target is irradiated by accelerated protons. The production of each 18F atom is accompanied by anisotropic highenergy neutron emission, which is a problem for ensuring radiation safety. These neutrons are responsible for the high radiation dose in a cyclotron pit during 18F production as well as for activation of cyclotron components or might be responsible even for target material changes due to their high penetration properties. A precise characterization of a neutron field on the surface of the liquid water target, used for 18F production, is presented. The neutron flux characterization is performed both by using large-area activation detectors and stilbene detectors at 1 m from the target in a forward direction. The experiments show significant discrepancies between calculated and measured reaction rates in higher threshold reactions 58Ni(n,x)57Co and 51V (n,alpha)48Sc, confirming that the current neutron production reaction models are not suitable for the characterization of the secondary neutrons leaking from the target.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10402 - Inorganic and nuclear chemistry
Návaznosti výsledku
Projekt
<a href="/cs/project/VI20192022116" target="_blank" >VI20192022116: Metody přenosu a detekce scintilačního záření s optickými vlákny a energetickým rozlišením zdrojů ionizujícího záření</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2021
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Radiation Physics and Chemistry
ISSN
0969-806X
e-ISSN
1879-0895
Svazek periodika
184
Číslo periodika v rámci svazku
July
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
13
Strana od-do
1-13
Kód UT WoS článku
000655297900005
EID výsledku v databázi Scopus
2-s2.0-85104089006