Electric-dipole-quadrupole interference of overlapping autoionizing levels in photoelectron energy spectra

    Authors

    N. L. S. Martin; D. B. Thompson; R. P. Bauman; C. D. Caldwell; M. O. Krause; S. P. Frigo;M. Wilson

    Comments

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    Abbreviated Journal Title

    Phys. Rev. Lett.

    Keywords

    ANGULAR-DISTRIBUTION PARAMETERS; COMPLEX IONIZATION AMPLITUDES; AUTO-IONIZING RESONANCES; NONDIPOLAR ASYMMETRIES; E, 2E SPECTROSCOPY; CADMIUM; Physics, Multidisciplinary

    Abstract

    We have measured the photon energy dependence of electric-dipole-quadrupole interference in cadmium between the odd parity 4d(9)5s(2)5p J = 1 and even parity 5p6p P-3(2) autoionizing levels. The resonant interference structure is isolated by taking the difference between constant ionic state spectra at 45 degrees with respect to the photon beam in the forward and backward directions. We find interference effects that are approximately 0.5% of the dipole cross section for photon energies of 13 eV, in good agreement with theory. We compare the results with those from (e,2e) experiments. [S0031-9007(98)06548-X].

    Journal Title

    Physical Review Letters

    Volume

    81

    Issue/Number

    6

    Publication Date

    1-1-1998

    Document Type

    Article

    Language

    English

    First Page

    1199

    Last Page

    1202

    WOS Identifier

    WOS:000075303600016

    ISSN

    0031-9007

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