Multiplet and lifetime effects in the4dphotoelectron spectrum of Eu
Multiplet and lifetime effects in the4dphotoelectron spectrum of Eu
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DOI：
10.1103/physreva.61.022713
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发表时间：
2000-01
影响因子：
2.9
通讯作者：
C. Gerth;K. Godehusen;M. Richter;P. Zimmermann;J. Schulz;P. Wernet;B. Sonntag;A. Kochur;I. Petrov
中科院分区：
文献类型：
--
作者：
C. Gerth;K. Godehusen;M. Richter;P. Zimmermann;J. Schulz;P. Wernet;B. Sonntag;A. Kochur;I. Petrov
测量了Eu的高分辨四维光电子能谱。光谱揭示了一个丰富的结构，反映了由于4d-4f，4f-4f和自旋-轨道相互作用引起的多重态分裂。为了解释复杂的4 d 2 1多重态结构，在中间耦合方案的计算进行考虑到每个4 d 2 1多重态的依赖于任期的寿命宽度。结果表明，4d-4f交换作用和寿命依赖性展宽对4d光电子能谱的形状有很强的影响.由于4d和4f轨道的内壳层性质，Eu原子的光谱与具有相同4f7占据率的Eu和Gd固体样品的光谱相似。
A high-resolution 4 d photoelectron spectrum of Eu has been measured. The spectrum reveals a rich structure reflecting multiplet splitting due to 4 d -4 f , 4 f -4 f , and spin-orbit interaction. In order to interpret the complex 4 d 2 1 multiplet structure, calculations in the intermediate coupling scheme were performed taking into account the term-dependent lifetime width of each 4 d 2 1 multiplet state. The strong influence of both the 4 d -4 f exchange interaction and the term-dependent lifetime broadening on the shape of the 4 d photoelectron spectrum is demonstrated. Due to the inner-shell character of the 4 d and 4 f orbitals, the spectrum of atomic Eu is similar to that of Eu and Gd solid samples having the same 4 f 7 occupancy.