ACTIVATION-ANALYSIS OF URANIUM AND THORIUM CONTAINED IN HIGH-PURITY NIOBIUM OXIDES

Authors
OKADA Y HIRAI S SUZUKI Y MITSUGASHIRA T
Citation
Y. Okada et al., ACTIVATION-ANALYSIS OF URANIUM AND THORIUM CONTAINED IN HIGH-PURITY NIOBIUM OXIDES, Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy, 40(1), 1994, pp. 25-28
Citations number
5
Categorie Soggetti
Material Science","Metallurgy & Mining
Journal title
Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy → ACNP
ISSN journal
00408808
Volume
40
Issue
1
Year of publication
1994
Pages
25 - 28
Database
ISI
SICI code
0040-8808(1994)40:1<25:AOUATC>2.0.ZU;2-N
Abstract
Uranium and thorium in high purity Nb2O5 were determined by neutron ac tivation analysis followed by radiochemical separation(RNAA). A separa tion procedure combined with anion exchange, solvent extraction with T BP and coprecipitation with LaF3 was developed and proved to have quan titative yields for the activation products of Np-239 and Pa-233. The decontamination factors of major impurities were determined. The detec tion limit for both elements was less than several ppts when a high fl ux reactor such as JMTR was available for activation. The method is us eful to the other composition materials containing niobium as a matrix element.