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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 32, Iss. 5 — Sep. 1, 1978
  • pp: 489–493

High Temperature Absorption of the 3.39 μm He-Ne Laser Line by Small Hydrocarbons

D. B. Olson, W. G. Mallard, and W. C. Gardiner

Applied Spectroscopy, Vol. 32, Issue 5, pp. 489-493 (1978)


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Abstract

Absorptivity measurements for the 3.39 μm He-Ne laser line are reported for methane, acetylene, ethylene, ethane, propane, n-butane, and n-pentane over the temperature range 300 < T < 2000°K. Shock-heated mixtures containing formaldehyde and methyl iodide showed no absorption or transient absorption at any temperature that could be attributed to formaldehyde or methyl radicals. The temperature dependence of the absorptivities of the C2 and higher hydrocarbons was much weaker than for methane. Comparison with simple theoretical expectations and broad-band absorptivities showed that the higher hydrocarbon absorptions include quite large numbers of absorbing states.

Citation
D. B. Olson, W. G. Mallard, and W. C. Gardiner, "High Temperature Absorption of the 3.39 μm He-Ne Laser Line by Small Hydrocarbons," Appl. Spectrosc. 32, 489-493 (1978)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-32-5-489


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