Nuclear Materials | Identification of isotopically rich materials using bulk composition mass spectra

The isotopic sensitivity, and ability to analyse small particles, makes SIMS the ideal technique for the study of nuclear materials. The spectrum below was measured from a uranium containing glass (under 1% wt.) using a 5keV oxygen primary ion beam and 500eV electron beam charge compensation. The 235U fraction is determined to be 0.55 ±0.02%; less than the 0.72% abundance expected from natural material.

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