Evaluation of transmutation detector response using SIMS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F17%3AN0000121" target="_blank" >RIV/26722445:_____/17:N0000121 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Evaluation of transmutation detector response using SIMS

Original language description

Transmutation detector (TMD) is a piece solid state material of required purity prepared for long-term measurement of neutron fluence in fission nuclear reactors, accelerators or fusion reactors [1]. The detection principle is based on the reaction of neutrons with nuclides in the TMD that leads to their transmutation into other stable nuclides. Using the cross sections of those reactions the concentration of stable nuclides in the TMDs can be converted into neutron fluence at the irradiation place. So far, two analytical techniques have been used for the measurement of concentration of transmuted nuclides in TMDs - ICP MS [1] and PGAA [2]. We have proposed and tested the use of SIMS for the evaluation of TMDs. As the TMD material we used foils of clean metals - Al, Au and chips of semiconductors - Si, Ge with the following set of the target/transmuted nuclides: 27Al/24Mg, 27Al/28Si, 197Au/196Hg, 197Au/198Hg, 28Si/25Mg, 29Si/26Mg, 30Si/31P, 70Ge/67Zn, 70Ge/71Ga. The TMDs were exposed to neutrons with fluence rate of 1013 cm-2s-1 for 20 days in the nuclear research reactor LVR-15. After irradiation and waiting time for lowering the activity of the TMDs to background level the concentrations of the transmuted elements were determined with SIMS (IMS 7f). Implanted calibration standards were used for the quantification of Mg, P, Si, Zn, Ga, Hg. Concentrations of transmuted nuclides were between 10 wt ppb and 1 wt ppm with the exception of 198Hg in Au, where the concentration at a level of ~1 wt % allowed for the use of EDS or WDS as calibration methods. We have shown that the SIMS technique is well suited for the evaluation of TMDs and has advantages in sample preparation and speed over the previously used analytical methods. Poster at 21st International Conference on Secondary Ion Mass Spectrometry - SIMS21, Kraków, Poland, 10.-15. September 2017

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

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

Project

<a href="/en/project/TG02010037" target="_blank" >TG02010037: COmmercialisation of results R&D for energy - CORD</a><br>

Continuities

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

Publication year

2017

Confidentiality

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