Bai Xiao, Metz Thomas, Ossler Frederik, Aldén Marcus
Division of Combustion Physics, Lund Institute of Technology, P.O. Box 118, SE-221 00 Lund, Sweden.
Spectrochim Acta A Mol Biomol Spectrosc. 2004 Mar;60(4):821-8. doi: 10.1016/S1386-1425(03)00307-X.
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.
在423至770 K的温度范围内，以及小于0.1至1 MPa的可变压力下，研究了甲醛蒸气的电子A1A2 <-- X1A1吸收光谱。甲醛的宽带振动电子和部分转动分辨的4(0)(1)振转光谱对温度表现出相当高的敏感性。随着压力增加，高分辨率光谱显示出碰撞诱导展宽。结果表明，Nd:YAG激光三倍频产生的激光辐射的吸收效率对激光的光谱特性（如谱线位置和形状）敏感。理论吸收光谱与实测吸收光谱的比较取得了有前景的结果。
