CO2 laser-induced multiphoton absorption of fluoroform- d : The effects of collisionsa

Studies of the multiphoton absorption of the 10 μm R(26) CO2 laser line by fluoroform-d have been extended to laser pulse widths (Δτ) of 60 ns over the range of pressures P=0.33 to 2.00 kPa. Comparison with earlier studies with Δτ=2 and 6 ns shows that for all fluences Φ the cross section σ=σ(Φ, PΔτ...

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Bibliographic Details
Published in:The Journal of chemical physics 1983-05, Vol.78 (10), p.5990-5992
Main Authors: McAlpine, Robert D., Evans, D. K., Adams, H. M.
Format: Article
Language:English
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Summary:Studies of the multiphoton absorption of the 10 μm R(26) CO2 laser line by fluoroform-d have been extended to laser pulse widths (Δτ) of 60 ns over the range of pressures P=0.33 to 2.00 kPa. Comparison with earlier studies with Δτ=2 and 6 ns shows that for all fluences Φ the cross section σ=σ(Φ, PΔτ), which means that σ scales with the number of collisions during the pulse. Log–log plots of σ(Φ) vs Φ (P, Δτ fixed) show a bend at a fluence Φc. For Φ
ISSN:0021-9606
1089-7690
DOI:10.1063/1.444614