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Vibrational relaxation of matrix-isolated ammonia studied by infrared double resonance

✍ Scribed by L. Abouaf-Margun; H. Dubost; F. Legay

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
325 KB
Volume
22
Category
Article
ISSN
0009-2614

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✦ Synopsis

The infrved vibration transition ~2 of NH3 isolated in a nitrogen matrix at 8'K is excited by the R(L0) and R(12) lines of the OO?l-10'0 transition of a Q-switched CO2 laser. When the continuous wave CO* laser, used as a probe, is at the s3me frequency as the pump, a short exponential decay of transmittance, which we consider to be due to the "2 = 1 vibrational relaxation, is observed (rl = 2 psec), followed by a slower thermal effect (72 = 200 psec). In Ar and CH4 matrices, only the slow thermal effect is observed.

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