Raising of Discrete Levels into the Far Continuum

Authors

J.L. Dehmer, University of Chicago, Chicago, Illinois
Anthony F. Starace, University of Nebraska-LincolnFollow
U. Fano, University of Chicago, Chicago, Illinois
J. Sugar, National Bureau of Standards, Washington, D. C.
J.W. Cooper, National Bureau of Standards, Washington, D. C.

Date of this Version

June 1971

Comments

Published by American Physical Society. Phys. Rev. Lett. 26, 1521 (1971). http://prl.aps.org. Copyright © 1971 American Physical Society. Permission to use.

Abstract

Broad peaks observed in the photoabsorption spectra of rare earths ∼10-20 eV above the 4d edge are attributed to transitions 4d¹⁰4f^N→4d⁹4f^N+1. Exchange interaction splits the 4d⁹4f^N+1 configuration and raises some multiplets by ∼20 eV. Autoionization to 4d⁹-4f^Nεf broadens the high levels. The interpretation extends to p→d processes observed in the absorption of synchrotron light by transition elements.