ISOTOPIC ANALYSIS OF BORON IN BORON TRIFLUORIDE BY MASS SPECTROMETRY, AND MEASUREMENT OF NATURAL BORON 10 CONCENTRATION
A conventional mass spectrometer is used for precise measurements of the isotope ratios of boron in boron trifluoride samples with widely differing concentrations of boron-10. "Memory" effects caused by the adsorption of boron trifluoride on to the surfaces of the inlet system were investigated, and it was found that these can be reof the inlet system. By blending together enriched and depleted boron trifluoride, standard samples with known isotopic constitutions are prepared and used to calibrate the mass spectrometer. The true and measured isotope ratios are thus found to differ by several per cent, an effect attributed to mass discriminations in the ion source. After correcting for this error, the boron-10 atomic concentration in some naturally occurring boron is found to be 19.27 plus or minus 0.13%. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority, Capenhurst, Chester, Eng.
- NSA Number:
- NSA-15-000171
- OSTI ID:
- 4125947
- Journal Information:
- J. Sci. Instr., Journal Name: J. Sci. Instr. Vol. Vol: 37
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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