Evolution of uranium monoxide in femtosecond laser-induced uranium plasmas

Kyle C. Hartig, Sivanandan S. Harilal, Mark C. Phillips, Brian E. Brumfield, Igor Jovanovic

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


We report on the observation of uranium monoxide (UO) emission following fs laser ablation (LA) of a uranium metal sample. The formation and evolution of the molecular emission is studied under various ambient air pressures. Observation of UO emission spectra at a rarefied residual air pressure of ∼1 Torr indicates that the UO molecule is readily formed in the expanding plasma with trace concentrations of oxygen present within the vacuum chamber. The persistence of the UO emission exceeded that of the atomic emission; however, the molecular emission was delayed in time compared to the atomic emission due to the necessary cooling and expansion of the plasma before the UO molecules can form.

Original languageEnglish (US)
Pages (from-to)11477-11490
Number of pages14
JournalOptics Express
Issue number10
StatePublished - May 15 2017
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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