Absorption of formaldehyde (H2CO) in the A1A2 <-- X1A1 band system at elevated temperatures and pressures.
The electronic A1A2 <-- X1A1 absorption spectra of formaldehyde vapour were studied at temperatures varying from 423 to 770 K with variable pressures from less than 0.1 to 1 MPa. Broadband vibronic and partially rotationally resolved 4(0)(1) rovibronic spectra of formaldehyde showed considerable sensitivity to temperature. The high resolution spectra showed collision-induced broadening as the pressure was increased. The results show that the absorption efficiency of the laser radiation from the third harmonic of Nd:YAG lasers is sensitive to the spectral properties of the laser, such as line position and shape. Promising results were obtained from the comparison between theoretical and measured absorption spectra.
Bai
Xiao
X
Division of Combustion Physics, Lund Institute of Technology, P.O. Box 118, SE-221 00 Lund, Sweden.
Metz
Thomas
T
Ossler
Frederik
F
Aldén
Marcus
M
D000042:Absorption; D003201:Computers; D005557:Formaldehyde / Q000032:analysis* / Q000737:chemistry; D006358:Hot Temperature; D007834:Lasers; D008956:Models, Chemical; D011312:Pressure; D013053:Spectrophotometry / Q000295:instrumentation* / Q000379:methods*; D013696:Temperature
D005557:Formaldehyde