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在流动余辉装置上 ,利用Ar与SO2 混合气体的空心阴极放电 ,在放电区的下游观察到一系列光谱 ,将 4 0 0～ 6 0 0nm波长范围内的发射谱带归属为SO(c1Σ-→X3 Σ-)跃迁 ,并得到该跃迁的ν0 0 =2 85 0 0cm-1。这是气相SO自由基c1Σ-电子态的首次直接的光谱观测。
In the mobile afterglow device, a series of spectra were observed downstream of the discharge zone by using a hollow cathode discharge gas mixture of Ar and SO2. The emission bands in the wavelength range of 400 ~ 600 nm were assigned as SO (c1Σ- → X3 Σ-) transition and obtain ν0 0 = 2 85 0 0cm-1 for this transition. This is the first direct spectral observation of the gaseous SO2 radical c1Σ-electron state.