An evaluation of ion-atom emission intensity ratios and local thermodynamic equilibrium in an argon inductively coupled plasma

Spatially resolved, radial electron density ( n e) profiles have been measured at rf power settings of 0.75, 1.25 and 1.75 kW, and vertical heights of 4,8,12,16,20 and 24 mm above the load coil. These measured values of n e have been used to construct a theoretical local thermal equilibrium (LTE) fr...

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Bibliographic Details
Published in:Spectrochimica acta. Part B: Atomic spectroscopy 1984, Vol.39 (12), p.1583-1602
Main Authors: Caughlin, B.L., Blades, M.W.
Format: Article
Language:English
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Summary:Spatially resolved, radial electron density ( n e) profiles have been measured at rf power settings of 0.75, 1.25 and 1.75 kW, and vertical heights of 4,8,12,16,20 and 24 mm above the load coil. These measured values of n e have been used to construct a theoretical local thermal equilibrium (LTE) framework. Ion-atom emission intensity ratios for Mg and Cd calculated from this framework have been compared to experimentally measured values. The measured ion-atom emission intensity ratios are found to be (ess than calculated LTE ratios. This suggests that the aerosol channel of the inductively coupled plasma can be characterized as an ionizing plasma.
ISSN:0584-8547
1873-3565
DOI:10.1016/0584-8547(84)80188-3