Multiphoton ionization of V, Cr, Y, La, and Ir through 0.5-ps ultraviolet laser pulses

Authors

• B. Witzel, Foundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, Laser and Applications Division, GR-711 10 Heraklion, Crete, Greece
• N. A. Poppadogiannis, Foundation for Research and Technology–Hellas, Institute of Electronic Structure and Laser, Laser and Applications Division, GR-711 10 Heraklion, Crete, Greece
• Cornelis J. Uiterwaal, University of Nebraska - LincolnFollow
• H. Schröder, Max-Planck-Institut für Quantenoptik, D-85740 Garching, Federal Republic of Germany
• D. Charalambidis, University of Crete, Heraklion, Crete, Greece

Document Type

Article

Date of this Version

October 1999

Comments

Published by American Physical Society. Phys. Rev. A 60, 3311 - 3312 (1999). http://link.aps.org/abstract/PRA/v60/p3311. Copyright © 1999 American Physical Society. Permission to use.

Abstract

The two-photon ionization of the metal atoms V, Cr, Y, La, and Ir sputtered by an Ar-ion gun from solid targets has been investigated using linearly polarized laser pulses of 500- fs duration and 248.6-nm (KrF) wavelength in combination with mass spectroscopy that is free of volume effects. A near-resonant ionization process has to be attributed to all five atoms. By fitting analytical solutions of a rate equation model describing the temporal evolution of the ionization process, we can determine absolute values of the one-photon cross sections and saturation intensities.