S J Firchow and K L Menningen 1999 J. Phys. D: Appl. Phys. 32 937 doi:10.1088/0022-3727/32/8/015
Radical density measurements in an atmospheric pressure oxyacetylene torch
S J Firchow and K L Menningen
Show affiliationsWe used highly sensitive absorption spectroscopy to quantify molecular radicals in the gas phase of an oxyacetylene torch diamond growth system. We measured column densities of 
, CH, CN and OH as a function of position in the flame for several different flame mixtures. We derived the flame gas kinetic temperature from the Swan band spectra. We searched for 
, singlet , and 
and established upper limits on the column densities of these radicals. The results were qualitatively correlated with diamond growth as judged by Raman spectra and scanning electron microscopy. The column densities of and CH correlate best with the growth of diamond.
- PACS
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78.30.Am Elemental semiconductors and insulators
68.37.Hk Scanning electron microscopy (SEM) (including EBIC)
68.55.A- Nucleation and growth
33.20.Fb Raman and Rayleigh spectra (including optical scattering)
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 8 (21 April 1999)
Received 27 October 1998, in final form 8 January 1999
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Radical density measurements in an atmospheric pressure oxyacetylene torch
S J Firchow and K L Menningen 1999 J. Phys. D: Appl. Phys. 32 937
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