Energy and angular distributions of particles desorbed from surfaces using multiphoton resonance ionization detection

R. Maboudian, M. El-Maazawi, Z. Postawa, C. T. Reimann, G. P. Malafsky, D. Hrubowchak, M. Ervin, B. J. Garrison, N. Winograd

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

Abstract

Multiphoton resonance excitation has been employed to ionize neutral atoms and molecules desorbed from surfaces bombarded by 5 ke V Ar+ ion beams. By positioning a laser beam above the target it is possible to image the ions onto a microchannelplate detector and to obtain energy and angle-resolved distributions. These distributions may be compared directly to classical dynamics computer simulations of the ion/impact event. Results are presented using the {001}, {111} and {331} crystal faces of Rh to illustrate how the distributions contain specific structural information. Moreover, we compare the distributions from {111} to secondary ion angular distributions. This comparison suggests that there are special impact points which lead to ion formation from clean metal surfaces. Finally, we present preliminary measurements for the MPRI of pyrene molecules desorbed from polycrystalline gold surfaces. The results suggest this technique may be valuable for monitoring reaction intermediates present at very low concentration on catalyst surfaces.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsS.Nicolas Nogar
PublisherPubl by Int Soc for Optical Engineering
Pages41-49
Number of pages9
ISBN (Print)0819402494
Publication statusPublished - Dec 1 1990
EventLaser Photoionization and Desorption Surface Analysis Techniques - Los Angeles, CA, USA
Duration: Jan 18 1990Jan 19 1990

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1208
ISSN (Print)0277-786X

Other

OtherLaser Photoionization and Desorption Surface Analysis Techniques
CityLos Angeles, CA, USA
Period1/18/901/19/90

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Maboudian, R., El-Maazawi, M., Postawa, Z., Reimann, C. T., Malafsky, G. P., Hrubowchak, D., ... Winograd, N. (1990). Energy and angular distributions of particles desorbed from surfaces using multiphoton resonance ionization detection. In S. N. Nogar (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (pp. 41-49). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1208). Publ by Int Soc for Optical Engineering.