Multiphoton excitation and ionization of atomic cesium with a tunable dye laser

D. Popescu, C. B. Collins, B. W. Johnson, and Iovitzu Popescu
Phys. Rev. A 9, 1182 – Published 1 March 1974
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The two-photon excitation and three-photon ionization of atomic cesium is investigated over the 6550-6950-Å wavelength region with a tunable-dye-laser source having a 0.06-0.08-Å linewidth and a space-charge ionization detector sensitive to a few ions per second. An online data-acquisition computer provides significant signal-to-noise recovery. The resulting dispersion curve for photoionization is interpreted in terms of the two-photon transitions from the ground 6S122 level to resonant nD2 and nS2 intermediate states, and represents, to the authors' knowledge, the first such two-photon absorption spectrum of Cs. Transitions from n=9to13 have been recorded for the 6S122nD52,322 series and from n=11to14 for the 6S122nS122 series.

  • Received 16 April 1973


©1974 American Physical Society

Authors & Affiliations

D. Popescu

  • Institute of Physics of Bucharest, Bucharest, Romania

C. B. Collins and B. W. Johnson

  • The University of Texas at Dallas, Dallas, Texas 75230

Iovitzu Popescu

  • University of Bucharest, Bucharest, Romania

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Vol. 9, Iss. 3 — March 1974

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