| Autor: |
Douglas E. Hof, Byron A. Palmer, T.J. Manning, J.D. Winefordner |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Spectrochimica Acta Part B: Atomic Spectroscopy. 46:447-451 |
| ISSN: |
0584-8547 |
| DOI: |
10.1016/0584-8547(91)80041-z |
| Popis: |
Line profiles of 10 Ar I lines emitted from an ICP ( T = 6800 K) are carefully evaluated with the Los Alamos Fourier Transform Spectrometer. In contrast to a previous paper, which reported measurements of 6p-4s, 5p-4s, and 4p-4s transitions (all 4s ground state), this Note deals with shifts for the transitions with 4p ground states. The shifts in line positions are on the order of 1 cm −1 . These shifts are accompanied by line profiles which have large contributions of pressure broadening. Previous work on a -parameters of elements in the analytical zone are on the order of 0.3–0.6 [1]. This note reports a-parameters as great as 39.03. Our HCL emission source could not be used as a standard because it lacked the excitation energy needed to adequately populate the higher energy levels. This results in a poor SNR for these lines. Argon I data reported by L i and H umphery [4] have been used for the unshifted values. It is the author's belief that with a large data set of experimentally determined line shifts from the ICP at a given set of operating conditions, a correlation between the magnitude of the line shift and the quantum numbers can be obtained for Ar. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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