Quantitative laser mass spectroscopy of sputtered versus evaporated metal atoms

Eftihia Varoucha, Nektarios A. Papadogiannis, Dimitrios Charalambidis, Alejandro Saenz, Hartmut Schröder, and Bernd Witzel
Phys. Rev. A 65, 012901 – Published 11 December 2001
PDFExport Citation

Abstract

We demonstrate that the presence of excited states in sputtered surface atoms after ion bombardment affects the measured ion yield of a subsequent post multiphoton-ionization processes. This effect was investigated using an advanced time-of-flight mass-spectroscopic technique. This work reports a comparison of two-photon ionization spectra of metallic atoms obtained from solid samples via sputtering and thermal evaporation that reveals the role of excited states. Furthermore we experimentally determine the cross sections for the two photon ionization processes of evaporated Mg, Zn, and In through quantitative ion yield measurement. Numerical configuration interaction calculations for Mg and Zn are presented and the resulting theoretical two-photon ionization cross sections are compared with the measured ones.

  • Received 26 June 2001

DOI:https://doi.org/10.1103/PhysRevA.65.012901

©2001 American Physical Society

Authors & Affiliations

Eftihia Varoucha, Nektarios A. Papadogiannis, and Dimitrios Charalambidis

  • Foundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, Laser and Applications Division, P.O. Box 1527, GR-711 10 Heraklion, Greece
  • Department of Physics, University of Crete, P.O. Box 2208, GR-710 03 Heraklion, Greece

Alejandro Saenz

  • Fachbereich Chemie, Universität Konstanz, Fach M 721, D-78457 Konstanz, Germany

Hartmut Schröder

  • Max-Planck-Institut für Quantenoptik, P.O. Box 1513, D-85740 Garching, Germany

Bernd Witzel

  • Department of Molecular and Optical Physics, Stephan-Meier Straße 19, 79104 Freiburg, Germany

References (Subscription Required)

Click to Expand
Issue

Vol. 65, Iss. 1 — January 2002

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×