Accession Number:

ADA179949

Title:

Vibrational Deactivation at Solid Surfaces.

Descriptive Note:

Final rept. 1 Jan 84-31 Dec 86,

Corporate Author:

CORNELL UNIV ITHACA NY

Personal Author(s):

Report Date:

1987-03-12

Pagination or Media Count:

10.0

Abstract:

The loss of vibrational energy was monitored by observing the decay of infrared fluorescence following pulsed excitation with a tunable infrared laser of molecules contained within a metallic or non-metallic cylindrical cell. The probability of collisional deactivation was obtain by measuring the decay time for the infrared fluorescence and dividing by the number of collisions per unit time calculated from gas-kinetic theory. The exchange of translational and rotational energy was studied by scattering molecules from a well characterized single-crystal surface. A molecular beam was used to prepare the initial species in its lowest vibrational and rotational levels, while the scattered species were detected either in a state-selected measurement using laser-induced multiphoton ionization or in a total-flux measurement using electron impact mass spectrometry. Keywords Surface Chemistry, Energy Transfer, Vibrations, Molecules.

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE