Certification of a uranium-238 dioxide reference material for neutron dosimetry (EC nuclear reference material 501)
Creators
- 1. Commission of the European Communities, Geel (Belgium). Central Bureau for Nuclear Measurements
Description
Uranium-238 oxide of 99.999% isotopic and 99.98% chemical purity was transformed into dioxide spheres of nominal 0.5 and 1.0 mm diameter by gel precipitation and subsequent calcination under carbon dioxide and under argon containing 5% hydrogen at 1 125 K. The spheres were analysed by thermal ionization mass spectrometry, including isotope dilution, by gravimetry and by potentiometric titration. On the basis of these analyses, the uranium mass fraction was certified at 879.4 ± 2.8 g.kg-1, and the 235U/U - and 238U/U abundances at 10.4 ± 0.5 mg.kg-1 and 999.9896 ± 0.0005 g.kg-1, respectively. The material is intended to be used as a reference material in neutron metrology
Availability note (English)
MF available from INIS under the Report Number.
Files
Restricted
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Additional details
Publishing Information
- Imprint Pagination
- 28 p.
- Report number
- EUR--12438
INIS
- Country of Publication
- European Commission (EC), Brussels (Belgium)
- Country of Input or Organization
- European Commission (EC), Brussels (Belgium)
- INIS RN
- 21085900
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CALIBRATION STANDARDS; IMPURITIES; ISOTOPE RATIO; NEUTRON DOSIMETRY; URANIUM DIOXIDE; URANIUM 238
- Descriptors DEC
- ACTINIDE COMPOUNDS; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; CHALCOGENIDES; DOSIMETRY; EVEN-EVEN NUCLEI; HEAVY NUCLEI; ISOTOPES; NUCLEI; OXIDES; OXYGEN COMPOUNDS; RADIOISOTOPES; SPONTANEOUS FISSION RADIOISOTO; URANIUM COMPOUNDS; URANIUM ISOTOPES; URANIUM OXIDES; YEARS LIVING RADIOISOTOPES