Research Papers in Physics and Astronomy

 

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 4d104fN→4d94fN+1. Exchange interaction splits the 4d94fN+1 configuration and raises some multiplets by ∼20 eV. Autoionization to 4d9-4fNεf broadens the high levels. The interpretation extends to pd processes observed in the absorption of synchrotron light by transition elements.

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