A Laser Microprobe System for Controlled Atmosphere Time and Spatially Resolved Fluorescence Studies of Analytical Laser Plumes

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Abstract:

A laser microprobe system has been developed that provides for time and spatially resolved studies of the interaction between the material ejected by a laser from a sample surface and the gaseous species in a controlled-atmosphere chamber. A microsecond flashlamp pumped dye laser atomizes the sample, and a narrow band, accurately tunable flashlamp pumped dye laser is the light source for absorption and fluorescence measurements of atomic and molecular species. A sample wheel rotates and translates to provide a new surface for hundreds of shots before resurfacing is required. Stepper motors allow the laser plume to be positioned in three dimensions by manual or computer control. Examples are given of the types of measurements that are possible under computer control. In an observation region comprising 0.05% of the plume, 109 atoms of Li are detectable.

Keywords: Atomic fluorescence: Spatial Mapping; Laser microprobe; Lithium

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702834634460

Affiliations: 1: Department of Chemistry, Oregon State University, Corvallis, Oregon 97331; present address: Exxon Nuclear Idaho, Idaho Falls, ID 83401 2: Department of Chemistry, Oregon State University, Corvallis, Oregon 97331; present address: Tektronix, Inc., Beaverton, OR 97077 3: Department of Chemistry, Oregon State University, Corvallis, Oregon 97331; present address: Texas Instruments, Dallas, TX 57222 4: Department of Chemistry, Oregon State University, Corvallis, Oregon 97331

Publication date: May 1, 1983

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