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The stretching vibrations of ammonia in its à 1A″2 excited state

✍ Scribed by R.N. Dixon

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
672 KB
Volume
147
Category
Article
ISSN
0009-2614

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✦ Synopsis

The v, and v) stretching modes of ammonia in its A state have been investigated through the time evolution of various wavepackets on a recently published ab initio surface. The strong anharmonicity associated with the low barriers to H+NHz dissociation products substantially reduces Y, from the value calculated for motion constrained to Cs,, and causes both v, and vj to have the character of transient resonances with very short lifetimes. These calculations confirm the assignment of diffuse bands in the ct +A emission spectrum, with v, (NH3) =2300+ 50 cm-' and u, (ND,

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