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- W2004238457 abstract "Copper, thanks to its low content in radioactive contaminations, is a material widely used for shielding, holders and other objects close to the sensitive parts of the detectors in many experiments in rare event physics. This implies that tools able to reach sensitivity of the order of <10−12 gram of contaminants per gram of copper are of crucial importance. A methodology based in Neutron Activation Analysis (NAA) has been developed to obtain an extremely high sensitivity in the analysis of 232Th in copper samples. A detection limit of 5×10−13 g 232Th/g Cu has been achieved through the irradiation of 200 g of copper sample which subsequently was radio‐chemically concentrated using nitric acid and then actinide resin from Eichrom Inc. Several elutions were performed with various inorganic acids to concentrate the 232Th activation product (233Pa) from the copper matrix and to also eliminate the radioactive background induced by the neutron bombardment to reach higher sensitivity." @default.
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- W2004238457 date "2011-01-01" @default.
- W2004238457 modified "2023-09-27" @default.
- W2004238457 title "Ultra Sensitive Neutron Activation Measurements of [sup 232]Th in Copper" @default.
- W2004238457 doi "https://doi.org/10.1063/1.3579557" @default.
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