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Title: Evidence for a Surface Exciton in KBr via Laser Desorption

Abstract

We demonstrate that direct photoexcitation of the KBr surface exciton leads to desorption of hyperthermal neutral bromine atoms. We have for the first time produced separately the hyperthermal and the near-thermal components of neutral halogen emission from an alkali halide. The source of hyperthermal bromine emission is attributed to decay of a surface exciton excited at photon energies below that of the bulk exciton. We further demonstrate that the frequently observed near-thermal component is derived from excitation within the bulk crystal. Our experimental data provides strong support to a theoretical emission model previously described in the literature.

Authors:
 [1];  [1];  [1]
  1. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab., Richland, WA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15001890
Report Number(s):
PNNL-SA-33478
KC0301020; TRN: US0400705
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter
Additional Journal Information:
Journal Volume: 63; Journal Issue: 12; Other Information: PBD: 1 Jan 2001
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ATOMS; BROMINE; DECAY; DESORPTION; EXCITATION; EXCITONS; HALOGENS; HYDROXIDES; LASERS; PHOTONS

Citation Formats

Beck, Kenneth M, Joly, Alan G, and Hess, Wayne P. Evidence for a Surface Exciton in KBr via Laser Desorption. United States: N. p., 2001. Web. doi:10.1103/PhysRevB.63.125423.
Beck, Kenneth M, Joly, Alan G, & Hess, Wayne P. Evidence for a Surface Exciton in KBr via Laser Desorption. United States. https://doi.org/10.1103/PhysRevB.63.125423
Beck, Kenneth M, Joly, Alan G, and Hess, Wayne P. 2001. "Evidence for a Surface Exciton in KBr via Laser Desorption". United States. https://doi.org/10.1103/PhysRevB.63.125423.
@article{osti_15001890,
title = {Evidence for a Surface Exciton in KBr via Laser Desorption},
author = {Beck, Kenneth M and Joly, Alan G and Hess, Wayne P},
abstractNote = {We demonstrate that direct photoexcitation of the KBr surface exciton leads to desorption of hyperthermal neutral bromine atoms. We have for the first time produced separately the hyperthermal and the near-thermal components of neutral halogen emission from an alkali halide. The source of hyperthermal bromine emission is attributed to decay of a surface exciton excited at photon energies below that of the bulk exciton. We further demonstrate that the frequently observed near-thermal component is derived from excitation within the bulk crystal. Our experimental data provides strong support to a theoretical emission model previously described in the literature.},
doi = {10.1103/PhysRevB.63.125423},
url = {https://www.osti.gov/biblio/15001890}, journal = {Physical Review. B, Condensed Matter},
number = 12,
volume = 63,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}