Title: Feasibility of conversion electron spectrometry using a Peltier-cooled silicon drift detector
Authors: PERÄJÄRVI K.TURUNEN J.IHANTOLA SakariKÄMÄRÄINEN V.POMME StefaanPÖLLÄNEN RSIISKONEN TSIPILÄ H.TOIVONEN H.
Citation: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY vol. 299 no. 1 p. 229-234
Publisher: SPRINGER
Publication Year: 2014
JRC N°: JRC83616
ISSN: 0236-5731
URI: http://link.springer.com/article/10.1007%2Fs10967-013-2788-0
http://publications.jrc.ec.europa.eu/repository/handle/JRC83616
DOI: 10.1007/s10967-013-2788-0
Type: Articles in periodicals and books
Abstract: A Peltier-cooled silicon drift detector was successfully applied for conversion electron spectrometry. The energy resolution of the detector for 45 keV electrons was 0.50 keV (FWHM). The approximate thickness of the dead layer was determined to be 140 ± 20 nm Si equivalent. The relative efficiency of the detector was verified to be approximately constant in the energy range of 17–75 keV. This is concordant with the high transparency of the thin dead layer and the sufficient thickness of the detector (450 lm) to stop the electrons. The detector is suitable for use in plutonium analysis of chemically prepared samples. Moreover, it was demonstrated that conversion electron spectrometry is better than alpha spectrometry in preserving its capability to determine the 240Pu/239Pu isotopic ratio as a function of sample thickness. The investigated measurement technique can be considered a promising new tool in safeguards, complementary to existing methods.
JRC Directorate:Health, Consumers and Reference Materials

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