Photon flux optimization in three-color multiphoton ionization of uranium atoms

David Levron; A. Bar-Shalom; Zeev Burshtein; R. David; G. Hazak; Joshua J. Ivry; Lawrence A. Levin; J. Oreg; Moshe Strauss

doi:10.1117/12.145511

28 May 1993 Photon flux optimization in three-color multiphoton ionization of uranium atoms

David Levron, A. Bar-Shalom, Zeev Burshtein, R. David, G. Hazak, Joshua J. Ivry, Lawrence A. Levin, J. Oreg, Moshe Strauss

Author Affiliations +

Proceedings Volume 1859, Laser Isotope Separation; (1993) https://doi.org/10.1117/12.145511
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

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.

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David Levron, A. Bar-Shalom, Zeev Burshtein, R. David, G. Hazak, Joshua J. Ivry, Lawrence A. Levin, J. Oreg, and Moshe Strauss "Photon flux optimization in three-color multiphoton ionization of uranium atoms", Proc. SPIE 1859, Laser Isotope Separation, (28 May 1993); https://doi.org/10.1117/12.145511

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