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Line Broadening Mechanisms in the Low Pressure Laser-induced Plasma by Igor B. Gornushkin; Leslie A King; Ben W. Smith; Nicoló Omenetto; James D. Winefordner is a Chemistry article available to read on EtoBox.
What is Line Broadening Mechanisms in the Low Pressure Laser-induced Plasma about?
The spectral profiles of Ca and Rb lines have been studied in a laser induced plasma as a function of pressure Ž . Ž . 1 ᎐ 10 torr and delay time with respect to the plasma initiation 1᎐10 s . Measurements were made in a plasma induced by the 1064-nm output of a Nd:YAG laser on a calcium carbonate matrix, doped with Rb. Spectral profiles were measured in absorption using a narrow-band cw Ti:Sapphire laser. It was shown that in the case of a trace Ž . element Rb in a CaCO matrix , the broadening mechanism was Doppler-dominant, whereas for a major matrix 3 Ž . component Ca , resonance broadening was the main contributor to the line shape. The plasma was shown to be Ž . Ž . non-equilibrium provided by the difference between the kinetic 3000 K and the excitation 8000 K temperatures. The electron number density at delay times of 5᎐10 s and pressures of 1᎐10 torr was estimated not to exceed 15 y3 Ž y1 . 10 cm . The number densities of Ca atoms in the ground and the excited 23 652 cm states were evaluated by Ž . ## 17 y3 measuring line width and peak absorption at 732.6 nm. They were found to be in the range of 1.5᎐2.2 = 10 cm Ž . 11 y3 for the ground state and 1.5᎐33 = 10 cm for the exci
Who reads Line Broadening Mechanisms in the Low Pressure Laser-induced Plasma?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Igor B. Gornushkin; Leslie A King; Ben W. Smith; Nicoló Omenetto; James D. Winefordner
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0584-8547)
- Published
- 1999
- Language
- EN
- Field
- Chemistry (Physical Sciences)