Electronic and Vibrational Absorption Spectra of NH2 in Solid Ne

Irradiation of ammonia dispersed in solid neon near 4 K with tunable far-ultraviolet light from a synchrotron yielded amidogen, NH 2 , and imidogen, NH, radicals as products. The electronic absorption spectra of amidogen radicals in isotopic variants NH 2 , NHD, and ND 2 were recorded in the visible and near-ultraviolet regions after photolysis of NH 3 and ND 3 . The infrared absorption lines of NH 2 associated with vibration-rotational levels of vibrational modes ν 1 at 3234.3 (0 0,0 -1 0,1 ), 3244.9 (0 0,0 -1 1,1 ), and 3249.3 cm -1 (0 0,0 -1 1,0 ), and ν 2 at 1498.7 (1 0,1 -1 1,1 ), 1509.5 (1 1,0 -1 0,1 ), 1516.5 (0 0,0 -1 0,1 ), 1528.6 (0 0,0 -1 1,1 ), and 1533.7 cm -1 (0 0,0 -1 1,0 ) were unambiguously identified according to the results of experiments with deuterium isotopes. The 0 0,0 -0 0,0 lines of ν 1 and ν 2 for NH 2 were derived to be at 3213.5 and 1494.6 cm -1 in solid neon.