- Conference date: 8-12 October 2000
- Location: Knoxville, Tennessee (USA)
For the analysis of actinide containing micron-size particles, a new experimental setup has been evaluated which uses sputtered neutral atoms instead of secondary ions. The atoms are post-ionized with lasers, either non-resonantly or resonantly. First experiments on non-resonant ionization of micron-size uranium oxide particles have shown that the sputter yields for secondary neutral atoms are much higher than for secondary ions, and uranium particles <0.5 μm can easily be detected and measured. The use of two-color, two-step resonant ionization of the sputtered neutral uranium atoms from thin films was investigated. Several excitation schemes were tested and a significant population on several low-lying metastable states after ion sputtering was observed.
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