Accession Number : ADA302896

Title :   Gas-Exposure Enhanced Na* Emission from Na-Rich Surfaces,

Descriptive Note : Rept. for 1 Feb 87-31 Jan 91,

Corporate Author : VANDERBILT UNIV NASHVILLE TN DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s) : Xu, Jun ; Barnes, Alan ; Yang, Xinxing ; Tolk, Norman

PDF Url : ADA302896

Report Date : JAN 1992

Pagination or Media Count : 13

Abstract : The optical emission attributed to electronically desorbed excited sodium atoms from NaCl and Na-evaporated surfaces is shown to be enhanced by exposure of the surface to gaseous CO2 and N2. This is the first observation of enhancement of electron-stimulated desorption of substrate atoms caused by the exposure of surfaces to gaseous molecules which do not contain the desorbed atoms. The large amount of excited sodium yield at 60 K provides evidence for non-existence of the secondary-electron excitation of thermally desorbed ground sodium.

Descriptors :   *EMISSION, *SODIUM, *GASES, THERMAL PROPERTIES, GROUND LEVEL, OPTICAL PROPERTIES, EXPOSURE(GENERAL), MOLECULES, EXCITATION, SUBSTRATES, ATOMS, NITROGEN, SURFACES, ELECTRON EMISSION, SECONDARY EMISSION, CARBON DIOXIDE.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Optics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE