Spatial and temporal distribution of metal atoms and their diatomic oxide molecules in femtosecond laser-induced plasmas
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Mokpo National Univ., Jeonnam (Republic of Korea)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Applied Spectra, Inc., Fremont, CA (United States)
Here, we investigate the distribution of atoms and diatomic metal-oxide molecules in femtosecond laser-induced plasmas generated at and after the laser beam focal plane, where non-linear phenomena give rise to the formation of a weakly ionized air plasma channel. We use direct plasma imaging and optical emission spectroscopy to study plasma expansion, and the associated physical and chemical separation processes. Plasma splitting occurs upon the interaction of the weakly ionized plasma with the sample and is accompanied by a change in the spatio-temporal distribution of the molecules and atoms compared to sampling at the focus. Furthermore, molecular emission is favored at specific locations and is enhanced over atomic emission as the sample is moved underneath the laser focus. These findings support the ability to enhance or impede the formation of molecular versus atomic species at specific spatio-temporal locations in the laser-induced plasma.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1460344
- Alternate ID(s):
- OSTI ID: 1460477
- Journal Information:
- Journal of Analytical Atomic Spectrometry, Vol. none, Issue none; ISSN 0267-9477
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Atomic spectrometry update: review of advances in atomic spectrometry and related techniques
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journal | January 2019 |
Atomic spectrometry update: review of advances in atomic spectrometry and related techniques
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journal | January 2018 |
Atomic spectrometry update: review of advances in atomic spectrometry and related techniques
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journal | January 2017 |
Atomic spectrometry update: review of advances in atomic spectrometry and related techniques
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journal | January 2013 |
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