Shape resonance scattering as a probe of excited-state adsorbate dynamics for CO chemisorbed on Ni(111)

Jeong Sook Ha, Steven J. Sibener

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper demonstrates that electronically resonant inelastic electron scattering can be used to probe the vibrational dynamics of chemisorbed species, and that the formation of a transient negative ion during scattering can lead to significant enhancement in the probability for vibrationally inelastic scattering. We specifically examine CO/Ni(111) chemisorbed in a c(4×2) structure. Our measurements consist of the incident energy dependencies for vibrationally inelastic scattering from different adsorbate modes, as well as the final angular distributions for electrons emerging from the transiently formed resonance. We also observe the presence of weak first overtone scattering for the CO intramolecular stretch under resonant scattering conditions. All of the observations are consistent with the formation of a Σ shape resonance in the vicinity of 18 eV which is slightly lower in energy, and has a shortened lifetime, than in the gas phase. Discussions are presented which emphasize that the presence (or absence) of vibrational excitation in a given vibrational coordinate following negative ion formation can be used to infer important details about femtosecond nuclear coordinate evolution for the system in the excited state.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsHai-Lung Dai, Steven J. Sibener
Place of PublicationBellingham, WA, United States
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages296-302
Number of pages7
Volume2125
ISBN (Print)0819414182
Publication statusPublished - 1994 Dec 1
Externally publishedYes
EventLaser Techniques for Surface Science - Los Angeles, CA, USA
Duration: 1994 Jan 271994 Jan 29

Other

OtherLaser Techniques for Surface Science
CityLos Angeles, CA, USA
Period94/1/2794/1/29

Fingerprint

Inelastic scattering
resonance scattering
Adsorbates
Excited states
inelastic scattering
Scattering
negative ions
probes
Negative ions
excitation
Electron scattering
Angular distribution
ion scattering
scattering
emerging
electron scattering
angular distribution
vapor phases
harmonics
life (durability)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ha, J. S., & Sibener, S. J. (1994). Shape resonance scattering as a probe of excited-state adsorbate dynamics for CO chemisorbed on Ni(111). In H-L. Dai, & S. J. Sibener (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 2125, pp. 296-302). Bellingham, WA, United States: Society of Photo-Optical Instrumentation Engineers.

Shape resonance scattering as a probe of excited-state adsorbate dynamics for CO chemisorbed on Ni(111). / Ha, Jeong Sook; Sibener, Steven J.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / Hai-Lung Dai; Steven J. Sibener. Vol. 2125 Bellingham, WA, United States : Society of Photo-Optical Instrumentation Engineers, 1994. p. 296-302.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ha, JS & Sibener, SJ 1994, Shape resonance scattering as a probe of excited-state adsorbate dynamics for CO chemisorbed on Ni(111). in H-L Dai & SJ Sibener (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 2125, Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, United States, pp. 296-302, Laser Techniques for Surface Science, Los Angeles, CA, USA, 94/1/27.
Ha JS, Sibener SJ. Shape resonance scattering as a probe of excited-state adsorbate dynamics for CO chemisorbed on Ni(111). In Dai H-L, Sibener SJ, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2125. Bellingham, WA, United States: Society of Photo-Optical Instrumentation Engineers. 1994. p. 296-302
Ha, Jeong Sook ; Sibener, Steven J. / Shape resonance scattering as a probe of excited-state adsorbate dynamics for CO chemisorbed on Ni(111). Proceedings of SPIE - The International Society for Optical Engineering. editor / Hai-Lung Dai ; Steven J. Sibener. Vol. 2125 Bellingham, WA, United States : Society of Photo-Optical Instrumentation Engineers, 1994. pp. 296-302
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