Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 110093 |
| Fachzeitschrift | Applied radiation and isotopes |
| Jahrgang | 181 |
| Frühes Online-Datum | 31 Dez. 2021 |
| Publikationsstatus | Veröffentlicht - März 2022 |
Abstract
Laser resonance ionization at the RISIKO 30 kV mass separator has been used to produce isotopically and isobarically pure and well quantified 222Rn emanation standards. Based upon laser-spectroscopic preparation studies, ion implantation into aluminum and tungsten targets has been carried out, providing overall implantation efficiencies of 40% up to 60%. The absolute implanted activity of 226Ra was determined by the technique of defined solid-angle α-particle spectrometry, where excellent energy resolution was observed. The 222Rn emanation coefficient of the produced targets was studied using α-particle and γ-ray spectrometry, and yielded results between 0.23 and 0.34, with relative uncertainty on the order of 1%. No dependence exceeding a 1% change of the emanation on humidity could be identified in the range of 15 %rH to 75 %rH, whereas there were hints of a slight correlation between the emanation and temperature. Additionally, and as expected, the emanation coefficient was found to be dependent on the target material as well as the implanted dose.
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- Strahlung
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in: Applied radiation and isotopes, Jahrgang 181, 110093, 03.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Ion implantation of 226Ra for a primary 222Rn emanation standard
AU - Mertes, Florian
AU - Kneip, Nina
AU - Heinke, Reinhard
AU - Kieck, Tom
AU - Studer, Dominik
AU - Weber, Felix
AU - Röttger, Stefan
AU - Röttger, Annette
AU - Wendt, Klaus
AU - Walther, Clemens
N1 - Funding Information: This project 19ENV01 traceRadon has received funding from the European Metrology Programme for Innovation and Research (EMPIR) programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme.19ENV01 traceRadon denotes the EMPIR project reference.
PY - 2022/3
Y1 - 2022/3
N2 - Laser resonance ionization at the RISIKO 30 kV mass separator has been used to produce isotopically and isobarically pure and well quantified 222Rn emanation standards. Based upon laser-spectroscopic preparation studies, ion implantation into aluminum and tungsten targets has been carried out, providing overall implantation efficiencies of 40% up to 60%. The absolute implanted activity of 226Ra was determined by the technique of defined solid-angle α-particle spectrometry, where excellent energy resolution was observed. The 222Rn emanation coefficient of the produced targets was studied using α-particle and γ-ray spectrometry, and yielded results between 0.23 and 0.34, with relative uncertainty on the order of 1%. No dependence exceeding a 1% change of the emanation on humidity could be identified in the range of 15 %rH to 75 %rH, whereas there were hints of a slight correlation between the emanation and temperature. Additionally, and as expected, the emanation coefficient was found to be dependent on the target material as well as the implanted dose.
AB - Laser resonance ionization at the RISIKO 30 kV mass separator has been used to produce isotopically and isobarically pure and well quantified 222Rn emanation standards. Based upon laser-spectroscopic preparation studies, ion implantation into aluminum and tungsten targets has been carried out, providing overall implantation efficiencies of 40% up to 60%. The absolute implanted activity of 226Ra was determined by the technique of defined solid-angle α-particle spectrometry, where excellent energy resolution was observed. The 222Rn emanation coefficient of the produced targets was studied using α-particle and γ-ray spectrometry, and yielded results between 0.23 and 0.34, with relative uncertainty on the order of 1%. No dependence exceeding a 1% change of the emanation on humidity could be identified in the range of 15 %rH to 75 %rH, whereas there were hints of a slight correlation between the emanation and temperature. Additionally, and as expected, the emanation coefficient was found to be dependent on the target material as well as the implanted dose.
KW - Rn emanation
KW - Defined solid-angle alpha-particle spectrometry
KW - Ion implantation
KW - Laser ionization
UR - http://www.scopus.com/inward/record.url?scp=85122326995&partnerID=8YFLogxK
U2 - 10.1016/j.apradiso.2021.110093
DO - 10.1016/j.apradiso.2021.110093
M3 - Article
C2 - 34995841
AN - SCOPUS:85122326995
VL - 181
JO - Applied radiation and isotopes
JF - Applied radiation and isotopes
SN - 0969-8043
M1 - 110093
ER -