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Proceedings Paper

Photon flux optimization in three-color multiphoton ionization of uranium atoms
Author(s): David Levron; A. Bar-Shalom; Zeev Burshtein; R. David; G. Hazak; Joshua J. Ivry; Lawrence A. Levin; J. Oreg; Moshe Strauss
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Paper Abstract

Ionization probability in three color excitation of uranium atoms depends on the photon flux which drives the transition to an autoionizing level. For a proper choice of the flux ratio, the ionization probability is insensitive of the actual fluxes over a considerable range. Thus, the laser intensities used may be lowered by a factor of about 3 as compared to values predicted on the basis of cross-sections of the individual transitions. A quantum-mechanical model, based on a detailed calculation of population dynamics of the levels in the ionization scheme, predicts the ionization probability as a function of the three-laser intensities. Ionization saturation measurements provide parameters for the model. The theoretical predictions were partially consistent with the experimental results. Ionization probabilities as high as 93% are achievable.

Paper Details

Date Published: 28 May 1993
PDF: 10 pages
Proc. SPIE 1859, Laser Isotope Separation, (28 May 1993); doi: 10.1117/12.145511
Show Author Affiliations
David Levron, Nuclear Research Ctr.-Negev (Israel)
A. Bar-Shalom, Nuclear Research Ctr.-Negev (Israel)
Zeev Burshtein, Nuclear Research Ctr.-Negev (Israel)
R. David, Nuclear Research Ctr.-Negev (Israel)
G. Hazak, Nuclear Research Ctr.-Negev (Israel)
Joshua J. Ivry, Nuclear Research Ctr.-Negev (Israel)
Lawrence A. Levin, Nuclear Research Ctr.-Negev (Israel)
J. Oreg, Nuclear Research Ctr.-Negev (Israel)
Moshe Strauss, Nuclear Research Ctr.-Negev (Israel)

Published in SPIE Proceedings Vol. 1859:
Laser Isotope Separation
Jeffrey A. Paisner, Editor(s)

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