title: Determination of traces of carbon, nitrogen and oxygen in molybdenum and tungsten.
abstract: The determination of carbon and nitrogen in molybdenum and of carbon, nitrogen and oxygen in tungsten, is described. The analytical techniques applied were charged-particle activation (carbon, nitrogen and oxygen), photon activation (carbon and oxygen), combustion (carbon) and vacuum-fusion extraction (nitrogen and oxygen). Chemical methods yielded upper limits in the 2-5 mug/g range. Activation analysis yielded 100 and 8 ng/g for carbon in molybdenum and tungsten respectively, 500 and 74 ng/g for nitrogen in molybdenum and tungsten respectively and 70 ng/g for oxygen in tungsten. The results obtained by charged-particle and photon activation agreed satisfactorily.
authors.affiliation: Institute of Nuclear Sciences, Rijksuniversiteit Gent, Proeftuinstraat 86, B-9000 Gent, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Vandecasteele
authors.forename: K
authors.initials: K
authors.lastname: Strijckmans
authors.forename: C
authors.initials: C
authors.lastname: Engelmann
authors.forename: H M
authors.initials: HM
authors.lastname: Ortner