Near-saddle-point-energy single- and two-photon Stark spectra of Sr

Author:

Spasopoulos D,Kalaitzis P,Cohen S

Abstract

Synopsis We present single-photon ionization Stark spectra of Sr as a function of static electric field strength and just above the saddle-point-energy. The spectra exhibit a significant number of avoided crossings between Stark resonances, superimposed on an ionization background due to the continuum excitation. The latter may be avoided by employing single- and two-photon ionization in conjunction with phase sensitive coherent control techniques. This scheme will lead to the isolation of the resonances in differential ionization cross section measurements.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

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