The isotopic analysis for plutonium-240 in plutonium by optical emission spectroscopy has been studied. The choice of analytical and internal standard lines, wavelength measurement, the conditions for sample preparation, and excitation in a sustained ac arc is discussed. Data is presented concerning the determination of plutonium-240 over a range of 3%–17% with a relative precision of the order of ±1% at the 95% confidence level, in addition to optical emission vs mass spectrographic data.
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