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利用激光腔内共振衰减技术 (CRDS) ,获取了CH2 CHO自由基的近紫外吸收光谱 .在此吸收光谱中 ,有一从 2 8786cm-1起始的振动 电子带 ,和一随能量而增加的宽吸收背景 .此CRDS吸收光谱和以前的低分辨吸收光谱相一致 ;其振动 电子吸收峰位置和在激光诱导荧光光谱及光解产物谱中的峰位置相吻合 .
The near-UV absorption spectrum of CH2 CHO radical was obtained by using laser cavity resonance attenuation technique (CRDS). In this absorption spectrum, there is a vibrational electron band starting from 2 8786cm-1 and increasing with energy Absorption background This CRDS absorption spectrum is consistent with previous low-resolution absorption spectra; its vibrational electron absorption peak position corresponds to the peak position in the laser-induced fluorescence spectrum and the photolysis product spectrum.