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Correlated relativistic calculation of the giant resonance in the Gd3+ absorption spectrum

✍ Scribed by S. Kotochigova; H. Levine; I. Tupitsyn

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 213 KB
Volume: 65
Category: Article
ISSN: 0020-7608
DOI: 10.1002/(sici)1097-461x(1997)65:5<575::aid-qua22>3.0.co;2-0

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✦ Synopsis

The aim of the present study is to extend the multiconfiguration Dirac᎐Fock approach to include spin polarization in order to study magnetically ordered systems. Routines handling time-dependent ionization phenomena adapted to multilevel and multichannel autoionization processes have been developed and used to describe the giant resonance in the Gd 3q absorption spectrum. In our calculation of the complete energy structure of 4 d 9 4 f 8 configuration it is discovered that the majority of the oscillator strength associated with the 4 d᎐4 f transitions is limited to a relatively narrow spectral width, creating a giant resonance. Our calculations take account of the most important correlation effects, and the agreement with the experimentally observed giant resonance in gadolinium is quite good.

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