ACTIVATION ANALYSIS OF ZIRCONIUM IN ZIRCONIUM-HAFNIUM MIXTURE

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi

OSTI ID:4634065

Oka, Y; Kato, T; Sasaki, M

Metals and oxides of Zr and Hf were photoactivated by bremsstrahlung produced by betatron and the residual radioactive nuclides were investigated in order to obtain the experimental condition for the determination of Zr in Zr-Hf mixtures. The individual metal or oxide was bombarded for 5 min by bremsstrahlung (maximum energy 24 Mev, maximum intensity approximates 10/sup 2/ rontgens/min/cm/sup 2/). With Zr target, Zr/sup 89m/ produced by Zr/sup 90/( gamma ,n) reaction was sufffcient for the purpose of determining Zr after the relatively short life radionuclides, mainly 125 sec O/sup 15/, had decayed out. The residual radioactivity of photoactivated Hf target was not recognized for the same condition as described above. The total radioactivity of the photoactivated Zr-Hf mixture was, therefore, attributed to 4.4 min Zr/sup 89m/. As the internal standard, copper powder was homogeneously mixed with Zr- Hf mixture and the radioactivity of the residual 9.7 min. Cu/sup 62/, produced by Cu/sup 63/( gamma ,n) reaction, was compared. When various mixtures of ZrO/sub 2/-HfO/sub 2/- Cu were photoactivated by the same condition as described above, the linear relationship was obtained between the ratios of the radioactivity, Zr (cps)/Cu (cps), and the ratios of the weight, W/sub ZrO/sub 2///W/sub Cu/. Hence, the determination of Zr in ZrHf mixture was attained by mixing the known amount of copper powder with finely powdered sample to be analyzed followed by the photoactivation by the described condition and the subsequent analysis of decay curve to obtain the ratio of the radioactivity, Zr/sup 89m//Cu /sup 62/. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-040750
• OSTI ID: 4634065
• Journal Information: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi, Journal Name: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi Vol. Vol: 84; ISSN NPKZA
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

ACTIVATION
ACTIVATION ANALYSIS
BEAMS
BETATRONS
BREMSSTRAHLUNG
CHEMISTRY
COPPER
COPPER 62
COPPER 63
DIAGRAMS
GAMMA RADIATION
HAFNIUM
HAFNIUM OXIDES
HALF-LIFE
MIXING
NEUTRON BEAMS
NUCLEAR REACTIONS
OXYGEN 15
POWDERS
QUANTITATIVE ANALYSIS
STANDARDS
TARGETS
ZIRCONIUM
ZIRCONIUM 89
ZIRCONIUM 90
ZIRCONIUM OXIDES