Title: Synthetic Mixtures of Thorium Isotopes.
Authors: RAPTIS KonstantinosMAYER KlausHERDRICKX FransDE BIEVRE P.
Citation: Intern. Journal of Mass Spectrometry and Ion Processes vol. 172 p. 15-24
Publication Year: 1998
JRC N°: JRC14547
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC14547
Type: Articles in Journals
Abstract: A series of synthetic mixtures of thorium isotopes was prepared on gravimetrical basis. The starting compounds consisted of natural thorium 232-Th (99.99%) and highly enriched 230-Th (99.8%). These materials were chemically purified and characterized for isotopic composition and chenical purity. ThO2 was demonstrated to be a suitable compound for gravimetrical blending. The isotope amount ratios in the mixtures range from 10(ex-2) to 3x10(ex-6). these synthetic isotope mixtures are the first ever prepared for thorium. they may serve for the calibration of measurements of thorium isotope amount ratios.
JRC Institute:Institute for Reference Materials and Measurements

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