Cross sections for electron-impact excitation of argon by fourier transform spectroscopy
- Univ. of Wisconsin, Madison, WI (United States)
The authors report absolute measurements of electron-impact excitation cross sections out of the ground level to the ten levels in the 3p{sup 5}4p configuration of argon. The apparent excitation cross sections are determined by measuring the optical cross sections for the emission lines in the 3p{sup 5}4p {r_arrow} 3p{sup 5}4s manifold. For cascade corrections the authors measured the optical cross sections for the various 3p{sup 5}5s {r_arrow} 3p{sup 5}4p and 3p{sup 5}4p infrared lines using a Fourier transform weak emission spectrometer to obtain the direct excitation cross sections from the optical data. Although the optical cross sections vary with pressure in the regime of 0.1 to 6 mTorr, the direct cross sections remain invariant. These pressure effects are understood within the framework of a radiation-reabsorption model. The excitation functions for the different transitions are also found to show considerable variation in shape.
- OSTI ID:
- 394335
- Report Number(s):
- CONF-9605105--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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