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Experimental investigation of a novel differential velocity modulation laser spectroscopy is reported and demonstrated with the spectra of n 2+ A2Dm -X2Ó g+ Meinel system. The S/N ratio excesses 500· ·1, about 60 times higher than that with the traditional non-differential technique. With this technique, we obtained the high-resolution electronic absorption spectra of A2D-X2Ó+ (1, 0) vibration-al...
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