Comparison of excitation and kinetic temperatures in a laser-produced plasma using absorption spectroscopy
Mark C. Phillips, Elizabeth J. Kautz, S. S. Harilal
Abstract
High-resolution tunable laser absorption spectroscopy is used to measure time-resolved absorption spectra for six neutral uranium transitions in a laser-produced plasma. Analysis of the spectra shows that kinetic temperatures are similar for all six transitions, but excitation temperatures are higher than kinetic temperatures from 10-100 μs, indicating departures from local thermodynamic equilibrium.
Topics & Concepts
SpectroscopyAbsorption spectroscopyMaterials scienceKinetic energyAbsorption (acoustics)PlasmaExcitationLaserSpectral lineAtomic physicsTunable diode laser absorption spectroscopyPlasma diagnosticsTime-resolved spectroscopyAnalytical Chemistry (journal)Ultrafast laser spectroscopyOpticsChemistryPhysicsAstronomyChromatographyComposite materialQuantum mechanicsLaser-induced spectroscopy and plasmaAnalytical chemistry methods developmentAtomic and Molecular Physics