Journal ArticleDOI
Excitation and Ionization in Arc and Spark Spectroscopic Sources
TLDR
In this article, the mathematical theories which are applicable to the excitation and ionization of atoms in plasmas at thermal equilibrium are described, which can be applied to practical problems which arise in spectrochemical analysis.Abstract:
The mathematical theories which are applicable to the excitation and ionization of atoms in plasmas at thermal equilibrium are described. These processes are controlled by the temperature and electron density in the plasma; some methods of determining these parameters are given. There have been several measurements of arc and spark temperatures in air, but few determinations of electron densities or of temperatures in gases other than air. It is shown that, even with the limited data available, the theories can be applied to practical problems which arise in spectrochemical analysis.read more
Citations
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Journal ArticleDOI
Time-resolved laser-induced breakdown spectrometry of aerosols
TL;DR: In this paper, the repetitive breakdown spark from a focused laser beam was used to generate analytically useful emission spectra of aerosols in air, and a simple one-dimensional hydrodynamic model predicts the temperature and diameter of the spark.
Journal ArticleDOI
Laser-induced breakdown spectroscopy: Time-resolved spectrochemical applications
L. J. Radziemski,T. R. Loree +1 more
TL;DR: In this paper, a photomultiplier-boxcar arrangement was used to detect phosphorus atoms from diisopropylmethyl phosphonate in air and also to detect chlorine in air, both in real time.
Journal ArticleDOI
Induction furnace method in atomic spectrometry
Yair. Talmi,George H. Morrison +1 more
Journal ArticleDOI
Source Parameters and Excitation in a Spark Discharge
TL;DR: In this article, a simple mass transport model, calculated from measured velocities of electrode vapor in the spark, was used to predict the time dependence of a primary feature of radiation emitted in the Al II spectrum.
Journal ArticleDOI
Direct Current Arc in Emission Spectrography II: Influence of Selected Buffer Compounds on the Properties of the Arc
R. J. Decker,D. J. Eve +1 more
TL;DR: In this paper, the results of a series of experiments were reported in which a number of selected buffer compounds were mixed with a synthetic sample containing elements of a wide range of volatilities.
References
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Journal ArticleDOI
Anode temperatures and characteristics of the dc arc in noble gases
Bert L. Vallee,Milton R. Baker +1 more
TL;DR: In this paper, a gas-tight arcing chamber and continuously recording optical pyrometer is described, where the current and voltage of the dc carbon arc in noble gases show a sensitive and systematic dependence on the atmospheres employed.
Journal ArticleDOI
Ionization in the Plasma of a Copper Arc
TL;DR: In this paper, the degree of ionization of eleven elements added to the copper has been determined from the relative intensities of arc and spark lines observed in a d-c arc in air between copper electrodes.
Journal ArticleDOI
A Study of the Gas-Stabilized Arc as an Emission Source for the Measurement of Oscillator Strengths. Determination of Some Relative gf-Values for Fe I.
TL;DR: An experiment indicates that when two elements are introduced into the arc in a solution, the relative concentrations of the elements in the discharge are the same as in the solution within the probable experimental error.
Journal ArticleDOI
A Method for Matrix Correction in the Spectrographic Determination of Uranium
William H. Dennen,A. V. Sankaran +1 more
TL;DR: In this article, the difference of relative intensity of U 4241A in various matrices is a thermal effect, which can be corrected by use of a temperature sensitive pair of titanium lines.