Triple excitation in relativistic coupled-cluster theory and properties of one-valence systems Rb and Sr$^+$

Details Triple excitation in relativistic coupled-cluster theory and properties of one-valence systems Rb and Sr$^+$ Triple excitation in relativistic coupled-cluster theory and properties of one-valence systems Rb and Sr$^+$

2011-09-30

arxiv.org/abs/1109.6912v1

Physics

Atomic Physics

15 pages, 13 figures and 8 tables

Scientific paper

We examine the contributions from triple excitation cluster operators in the relativistic coupled-cluster theory in atoms and ions. For this, we propose a tensor representation of the triple cluster operator. Based on this representaion and using diagrammatic analysis, we derive the linearized coupled-cluster equations for single, double and triple excitation cluster operators. The contributions from the triple cluster operators to the hyper fine structure constants of single-valence systems Rb and Sr$^+$ are analysed using the perturbed triples.

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