Determination of Surface Exciton Energies by Velocity Resolved Atomic Desorption

Journal Article · Fri Aug 20 00:00:00 EDT 2004 · Surface Science, 564(1-3):62-70

DOI:https://doi.org/10.1016/j.susc.2004.05.092· OSTI ID:860020

Hess, Wayne P; Joly, Alan G; Beck, Kenneth M; Sushko, Petr V; Shluger, Alexander L

We have developed a new method for determining surface exciton band energies in alkali halides based on velocity-resolved atomic desorption (VRAD). Using this new method, we predict the surface exciton energies for K1, KBr, KC1, and NaC1 within +0.15 eV. Our data, combined with the available EELS data for alkali fluorides, demonstrate a universal linear correlation with the inverse inter-atomic distance in these materials. The results suggest that surface excitons exist in all alkali halides and their excitation energies can be predicted from the known bulk exciton energies and the obtained correlation plot.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 860020
• Report Number(s): PNNL-SA-40479; SUSCAS; 4792; KC0301020; TRN: US0504843
• Journal Information: Surface Science, 564(1-3):62-70, Vol. 564, Issue 1-3; ISSN 0039-6028
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DESORPTION
EXCITATION
EXCITONS
FLUORIDES
HALIDES
HYDROXIDES
VELOCITY
Environmental Molecular Sciences Laboratory