Studies of Energy Transfer and Selective Chemical Reaction Using Tunable IR Radiation.
Final rept. 1 Feb 77-31 Dec 81,
CAMBRIDGE UNIV (ENGLAND) DEPT OF PHYSICAL CHEMISTRY
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Tunable infrared lasers have been used to excite selected vibrational levels of molecules for kinetic studies. It was demonstrated that stimulated electronic Raman scattering SERS in Cs vapour provides a useful tunable source between 2.7 and 3.3 micrometers. Later this source was supplanted by an optical parametric oscillator OPO supplying high energy pulses 1-5 mJ over a wider range 1.5-3.6 micrometers. Both sources have been used in detailed studies of the relaxation of HCN. When finished these experiments will yield the most complete picture of relaxation rates and pathways in any simple polyatomic molecule. In addition, new direct methods have yielded rates of relaxation of a high vibrational levels in HF, and b NO and OH in collision with other free radicals. Finally, some preliminary work on selective laser-induced chemistry both in the gas-phase and in low temperature matrices has been carried out. Author
- Lasers and Masers
- Atomic and Molecular Physics and Spectroscopy