Cation-like Doppler shifts from a neutral molecule in an electrical discharge

Details Cation-like Doppler shifts from a neutral molecule in an electrical discharge Cation-like Doppler shifts from a neutral molecule in an electrical discharge

2006-11-30

arxiv.org/abs/physics/0611298v1

Chemical Physics Letters 409 (30/06/2005) 310-314

Physics

Chemical Physics

Scientific paper

Velocity-modulation Fourier transform emission spectra from a N_2O/He discharge plasma recorded between 1 and 5.5 $\mu$m are described. Surprisingly, they show Doppler-shifted lines for the E ^2 \Sigma ^+ - D ^2 \Sigma ^+, C ^2 \Pi - A ^2 \Sigma ^+, and D ^2 \Sigma ^+ - A ^2 \Sigma ^+ 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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