Phys. Rev. Lett. 84, 3795–3798 (2000)Determination of Cross Sections and Continuum Phases of Rubidium through Complete Measurements of Atomic Multiphoton IonizationReceived 18 May 1999; revised 13 March 2000; published in the issue dated 24 April 2000 We present a complete experimental determination of the atomic parameters necessary to unambiguously characterize two-photon ionization of atomic rubidium, i.e., the relative photoionization cross sections and the continuum wave function phase difference. We obtain these complete results through a single measurement, that of the two-photon photoelectron angular distribution using elliptically polarized light. While measured phase differences are in excellent agreement with expected values, the ratios of photoionization cross sections of the two D channels are not. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.3795
DOI:
10.1103/PhysRevLett.84.3795
PACS:
32.80.Rm, 32.10.-f
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