Time and spatially resolved atomic absorption measurements with a dye laser plume atomizer and pulsed hollow cathode lamps

1979 ◽  
Vol 51 (13) ◽  
pp. 2066-2070 ◽  
Author(s):  
R. M. Manabe ◽  
Edward H. Piepmeier
Keyword(s):  
Atomic Absorption ◽  
Hollow Cathode ◽  
Dye Laser ◽  
Laser Plume ◽  
Spatially Resolved ◽  
Absorption Measurements

Atomic Absorption Measurements in a Q-Switched Laser Plume Using Pulsed Hollow Cathode Lamps

1973 ◽  
Vol 27 (3) ◽  
pp. 165-170 ◽  
Author(s):  
D. E. Osten ◽  
E. H. Piepmeier
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Atomic Absorption ◽  
Hollow Cathode ◽  
Laser Energy ◽  
Laser Plume ◽  
Calibration Curves ◽  
Absorption Characteristics ◽  
Absorption Measurements

Quantitative atomic absorption measurements on transient plasmas induced by a Q-switched laser beam were made using pulsed hollow cathode lamps. Calibration curves were obtained for 0.002 to 0.15% Cu in an aluminum alloy and 0.013 to 0.124% Mn in graphite pellets. The dependence of the atomic absorption characteristics upon changes in laser energy and upon atmospheric gas and pressure is discussed.

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

1983 ◽  
Vol 37 (3) ◽  
pp. 263-269 ◽  
Author(s):  
A. L. Lewis ◽  
G. J. Beenen ◽  
J. W. Hosch ◽  
E. H. Piepmeier
Keyword(s):  
Computer Control ◽  
Dye Laser ◽  
Three Dimensions ◽  
Controlled Atmosphere ◽  
Laser Plume ◽  
Gaseous Species ◽  
Fluorescence Studies ◽  
Laser Microprobe ◽  
Spatially Resolved ◽  
Fluorescence Measurements

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.

Study of the width of the mercury line at ?=253.7 nm in a light source for atomic-absorption measurements

1977 ◽  
Vol 27 (3) ◽  
pp. 1214-1214 ◽  
Author(s):  
�. L. Al'tman ◽  
A. A. Ganeev ◽  
Yu. I. T�rkin ◽  
S. E. Sholupov
Keyword(s):  
Atomic Absorption ◽  
Light Source ◽  
Absorption Measurements

Spatial Distribution of Radiant Intensity from Primary Sources for Atomic Absorption Spectrometry. Part I: Hollow Cathode Lamps

1995 ◽  
Vol 49 (4) ◽  
pp. 413-424 ◽  
Author(s):  
Albert Kh. Gilmutdinov ◽  
Bernard Radziuk ◽  
Michael Sperling ◽  
Bernhard Welz ◽  
Konstantin Yu. Nagulin
Keyword(s):  
Spatial Distribution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Intensity Distribution ◽  
Hollow Cathode ◽  
Imaging System ◽  
Absorption Spectrometry ◽  
Operating Conditions ◽  
Radiant Intensity ◽  
Warm Up

The spatial distribution of radiant intensity from hollow cathode lamps used as radiation sources in atomic absorption spectrometry is investigated with a digital photodiode array imaging system. Intensity distribution over the cross section of each lamp is measured for both atomic and ionic lines of the analyte and the filler gas. The shape of the distribution is strongly dependent on the hollow cathode diameter. In small cathodes the distribution has the shape of a paraboloid with maximum intensity at the hollow cathode axis for all of the recorded lines. The intensity distributions of lines emitted from large cathodes are nonparaboloid and in some cases have a minimum at the cathode axis and a maximum concentric to the cathode walls. It is shown that the intensity distribution for a given lamp has practically the same shape for all currents applied. Data on the evolution of the intensity distribution during warm-up of the lamps and under various operating conditions are presented.

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