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Journal of Physics Conference Series

Photoionization of polarized doublet states of Xenon atom

E. A. Viktorov, A. A. Pastor, Pavel Yu. Serdobintsev, K. Miculis, Nikolai N. Bezuglov

Published Dec 1, 2021• 4 citations
Publisher

Abstract

Abstract We studied experimentally and theoretically the ionization of a two-photon excited superposition of 4f states of Xe atom by probe femtosecond pulse laser in a supersonic beam. The revealed oscillation structure in the observed photoionization signals is associated with the interference of the coherently populated components of Xe doublet states. Our results demonstrate the high efficiency of proposed experimental scheme for registering quantum beats in the photoelectron current.

DOI
10.1088/1742-6596/2086/1/012174

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We present a theory of quantum beats in photoionization from a coherent superposition of D32,5.2{D}_{\frac{3}{2},5.2}D23​,5.2​ levels in alkali-metal atoms. The semiclassical density-matrix formalism is used to describe both the excitation of the D32,52{D}_{\frac{3}{2},\frac{5}{2}}D23​,25​​ levels by a two-photon resonant pulse and the subsequent photoionization by a delayed probe pulse. Quantum beats occur in the ionization signal as a function of the delay of the probe pulse. The depth of modulation is determined for different light polarizations.