Two-dimensional fluorescence spectroscopy of uranium isotopes in femtosecond laser ablation plumes.

ABSTRACT: We demonstrate measurement of uranium isotopes in femtosecond laser ablation plumes using two-dimensional fluorescence spectroscopy (2DFS). The high-resolution, tunable CW-laser spectroscopy technique clearly distinguishes atomic absorption from ²³⁵U and ²³⁸U in natural and highly enriched uranium metal samples. We present analysis of spectral resolution and analytical performance of 2DFS as a function of ambient pressure. Simultaneous measurement using time-resolved absorption spectroscopy provides information on temporal dynamics of the laser ablation plume and saturation behavior of fluorescence signals. The rapid, non-contact measurement is promising for in-field, standoff measurements of uranium enrichment for nuclear safety and security.

SUBMITTER: Phillips MC 

PROVIDER: S-EPMC5476594 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature