Accession Number : ADA137066

Title :   The Role of Phonons in the Excitation and Relaxation of Adspecies.

Descriptive Note : Interim technical rept.,


Personal Author(s) : Beri,A C ; Lee,K T ; George,T F

PDF Url : ADA137066

Report Date : Jan 1984

Pagination or Media Count : 13

Abstract : The IR laser excitation of an adbond is studied by both a quantum mechanical generalized master equation approach and a classical generalized Langevin approach. The role of phonons in the energy flow between the adbond and the surface is considered. The latter approach looks further at local heating via direct excitation of surface atoms. It is seen that the Markovian approximation is in general inadequate, and that local heating is an important mechanism for desorption. (Author)

Descriptors :   *Chemical bonds, *Lasers, *Phonons, *Quantum theory, *Excitation, Relaxation, Quantum chemistry, Equations, Markov processes, Approximation(Mathematics), Desorption, Heating, Atoms, Surfaces, Infrared lasers, Energy transfer, Resonance, Vibration, Electronic states, Lattice dynamics, Hamiltonian functions, Perturbation theory, Photochemical reactions

Subject Categories : Radiation and Nuclear Chemistry
      Lasers and Masers
      Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE