DOI: 10.1063/1.1410907. Selective laser desorption of ionic surfaces: Resonant surface excitation of KBr

Selective laser desorption of ionic surfaces: Resonant surface excitation of KBr

10.1063/1.1410907

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

We demonstrate evidence of selective laser-induced desorption of ground state Br(2P3/2) and spin–orbit excited state Br(2P1/2) atoms from KBr single crystals following 6.4 eV irradiation. Laser excitation tuned selectively to a surface resonance below the first bulk absorption band excites surface states preferentially leading to surface specific reactions while inducing relatively insignificant bulk reaction. The experimental results are supported by embedded cluster ab initio calculations that indicate a reduced surface exciton energy compared to that of the bulk exciton with a slight further reduction for steps and kink sites. Low fluence irradiation of cleaved KBr crystals, near the calculated surface exciton energy of 6.2 eV, produces hyperthermal Br(2P3/2) emission without a significant thermal or Br(2P1/2) component. The hyperthermal emission is shown theoretically to be characteristic of surface induced reaction of exciton decomposition while thermal emission is attributed to bulk photoreaction.

Bibliography

Hess, W. P., Joly, A. G., Gerrity, D. P., Beck, K. M., Sushko, P. V., & Shluger, A. L. (2001). Selective laser desorption of ionic surfaces: Resonant surface excitation of KBr. The Journal of Chemical Physics, 115(20), 9463â9472.

Authors 6

Wayne P. Hess (first)
Alan G. Joly (additional)
Daniel P. Gerrity (additional)
Kenneth M. Beck (additional)
Peter V. Sushko (additional)
Alexander L. Shluger (additional)

References 50 Referenced 35

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:01 a.m.)
Deposited	1 year, 7 months ago (Feb. 5, 2024, 2:45 p.m.)
Indexed	1 year, 6 months ago (Feb. 11, 2024, 4:42 a.m.)
Issued	23 years, 9 months ago (Nov. 22, 2001)
Published	23 years, 9 months ago (Nov. 22, 2001)
Published Print	23 years, 9 months ago (Nov. 22, 2001)

Funders 0

None

BibTeX

@article{Hess_2001, title={Selective laser desorption of ionic surfaces: Resonant surface excitation of KBr}, volume={115}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1410907}, DOI={10.1063/1.1410907}, number={20}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Hess, Wayne P. and Joly, Alan G. and Gerrity, Daniel P. and Beck, Kenneth M. and Sushko, Peter V. and Shluger, Alexander L.}, year={2001}, month=nov, pages={9463–9472} }

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