Multiplet and lifetime effects in the 4d photoelectron spectrum of Eu

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Inst. fur Atomare und Analyt. Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany ^{[1
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Physical Review A - Atomic, Molecular, and Optical Physics | 2000年 / 61卷 / 02期

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摘要：

A high-resolution 4d photoelectron spectrum of Eu has been measured. The spectrum reveals a rich structure reflecting multiplet splitting due to 4d-4f, 4f-4f, and spin-orbit interaction. In order to interpret the complex 4d-1 multiplet structure, calculations in the intermediate coupling scheme were performed taking into account the term-dependent lifetime width of each 4d-1 multiplet state. The strong influence of both the 4d-4f exchange interaction and the term-dependent lifetime broadening on the shape of the 4d photoelectron spectrum is demonstrated. Due to the inner-shell character of the 4d and 4f orbitals, the spectrum of atomic Eu is similar to that of Eu and Gd solid samples having the same 4f7 occupancy.

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页码：227131 / 227134