Independent electron theory of multiple ionization of xenon by intense laser pulses View Full Text


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Article Info

DATE

1991-04

AUTHORS

V. Berardi, M. Armenante, R. Bruzzese, F. Esposito, S. Solimeno, N. Spinelli, S. Bakhramov

ABSTRACT

The intensity dependence of the multiphoton ionization spectra of Xe atoms has been investigated with an improved accuracy and well-controlled laser parameters. In particular, we have examined the ionization rates for X3+, X2−, X+ as functions of the laser intensity and the pressure in the target chamber. The apparatus used for these measurements is characterized by a high-energy resolution (better than 200 meV) and a completely digital acquisition system. The time-of-flight spectra clearly show the contributions of the different isotopes present in Xe gas. The laser pulses have been characterized with great accuracy by monitoring the energy, pulse width and divergence shot by shot. The ionization rates of the different ions have been used for testing the basic assumption of the Geltman theory of multiple ionization based on the single electron ionization model. We have found that for the small intensity range investigated the quantity (dXe+/dI)·(dXe3+/dI)/(dXe2+/dI)2 appears to be quite close to the value 0.5 predicted by this model. More... »

PAGES

423-433

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02452127

DOI

http://dx.doi.org/10.1007/bf02452127

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1001860281


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