Journal
APPLIED OPTICS
Volume 50, Issue 3, Pages 313-317Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.50.000313
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- Defense Threat Reduction Agency of the United States Department of Defense (DOD)
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We present spectra of depleted uranium metal from laser plasmas generated by nanosecond Nd:YAG (1064 nm) and femtosecond Ti:sapphire (800 nm) laser pulses. The latter pulses produce short-lived and relatively cool plasmas in comparison to the longer pulses, and the spectra of neutral uranium atoms appear immediately after excitation. Evidence for nonequilibrium excitation with femtosecond pulses is found in the dependence of spectral line intensities on the pulse chirp. (C) 2011 Optical Society of America
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