Imaging of the fluorescence created by ablation of Y[sub 2]O[sub 3], BaO[sub 2], CuO, and YBa[sub 2]Cu[sub 3]O[sub 7[minus]x] by 308-nm laser light
- Wayne State Univ., Detroit, MI (United States)
A gated intensified CCD camera is used to acquire time-resolved images of the plume generated from the excimer laser ablation of CuO, BaO[sub 2], Y[sub 2]O[sub 3], and YBa[sub 2]Cu[sub 3]O[sub 7[minus]x] pellets in vacuum, He, or O[sub 2]. Narrow (12-nm FWHM) bandpass filters are used to select emission from individual species within the plume. The spatial and the temporal evolution of the emission is unique for each of the ejected ions, atoms, and diatomics. A luminous shock front, i.e., a blast wave, is observed at pressures greater than 1 Torr in He and 0.1 Torr in O[sub 2]. The propagation of this shock front is suitably described by scaling factors that were previously developed to describe the shock waves from a point explosion. Images of emission from atomic Cu and O were acquired after the ablation of CuO. These images imply that ion/electron bombardment is significant within the plasma plume. The time dependence of the images shows the evolution of the shock wave and suggests the origin of the luminous plume. 63 refs., 16 figs.
- OSTI ID:
- 7207414
- Journal Information:
- Applied Spectroscopy; (United States), Journal Name: Applied Spectroscopy; (United States) Vol. 47:7; ISSN 0003-7028; ISSN APSPA4
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ABLATION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CERAMICS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
EMISSION SPECTROSCOPY
FLUORESCENCE SPECTROSCOPY
OXIDES
OXYGEN COMPOUNDS
SPECTROSCOPY
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES