Vibrationhyphen;rotation transitions of NH2in theAtilde;thinsp;2A1state were observed with subhyphen;Doppler resolution, by using a Rh 6G dye laser and aCO2/N2Olaser combined with the laser magnetic resonance technique. When the dye laser pumped theAtilde;thinsp;2A1thinsp;(0,9,0)thinsp;220larr;Xtilde;thinsp;2B1(0,0,0)thinsp;110transition,39thinsp;MJcomponents of(0,10,0)thinsp;211larr;(0,9,0)thinsp;220, and5thinsp;MJcomponents of(0,10,0)thinsp;111larr;(0,9,0)thinsp;220in Atilde; were observed by sweeping the magnetic field. Four additional lines which corresponded to changes in fluorescence intensity opposite in sign to those for the transitions mentioned above, were also observed and assigned to transitions fromAtilde;thinsp;2A1(0,9,0)to a highly excited vibrational state ofXtilde;thinsp;(ldquo;ursquo;rsquo; level).The rotational quantum numbersNandJand the spin splitting of theulevel were determined as well as the interaction term between theuandAtilde;thinsp;(0,10,0)thinsp;211states. Theulevel is tentatively assigned to a rotational level inXtilde;(2,8,0),however, the observed spin splitting does not agree with that forXtilde;(0,8,0)calculated by Jungen, Hallin, and Merer.
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