Abstract:
To get higher atomization efficiency of Pu used for laser resonance ionization mass spectrometer (LRIMS) which can improve the sensitivity of trace Pu measured by mass spectrometry, Pu source covered with metal was made by electrodeposition. The quantitative electrodeposition of Pu was achieved by designing an electrodepositor and optimizing electrodeposition conditions. Compared with Pt coating, a Ti coating was prepared by vacuum evaporation, and the thickness of which is 1 μm. The whole deposition rate of Pu is above 95%. The total detection efficiency of LRMIS for Pu is 2.5×10
-4, and the atomization efficiency of Pu source coated by Ti is 7.7%, which are three orders of magnititude higher than direct drop source. This lays the foundation for analysis of trace amounts of Pu in the environment by LRIMS with high sensitivity.
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