放电中中性分子的类阳离子多普勒频移
Cation-like Doppler shifts from a neutral molecule in an electrical discharge
摘要：
本文报道了在1 ~ 5.5 $μ$ m之间记录的N_2O/He放电等离子体速度调制傅里叶变换发射光谱。令人惊讶的是，他们显示了一氧化氮中性分子的E ^2 Σ^+ - D ^2 Σ^+、C ^2 Π- A ^2 Σ^+和D ^2 Σ^+ - A ^2 Σ^+ Rydberg-Rydberg旋振子跃迁的多普勒频移谱线。这些依赖于极性的多普勒频移是那些带正电的粒子。NO的振动-转动谱线和N_2等中性分子的振动-转动谱线也出现在光谱中，强度相当，并且没有发生位移。实验研究和可能的解释进行了讨论。
英文摘要：
Velocity-modulation Fourier transform emission spectra from a N_2O/He discharge plasma recorded between 1 and 5.5 $μ$m are described. Surprisingly, they show Doppler-shifted lines for the E ^2 Σ^+ - D ^2 Σ^+, C ^2 Π- A ^2 Σ^+, and D ^2 Σ^+ - A ^2 Σ^+ Rydberg-Rydberg rovibronic transitions of the nitric oxide neutral molecule. These polarity-dependent Doppler-shifts are those of positively charged particles. Vibration-rotation lines of NO and transitions from other neutral molecules like N_2 are also present in the spectra with comparable intensities and remain unshifted. Experimental investigations and possible explanations are discussed.
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