On accurate computations of slowly convergent atomic properties in few-electron ions and electron-electron correlations

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• 作者：Alexei M. Frolov ; David M. Wardlaw
• 关键词：Computational Methods
• 刊名：The European Physical Journal B - Condensed Matter
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：89
• 期：9
• 全文大小：189 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Physics
  Complexity
  Fluids
  Solid State Physics and Spectroscopy
  Superconductivity, Superfluidity and Quantum Fluids
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1434-6036
• 卷排序：89

文摘

We discuss an approach to accurate numerical computations of slowly convergent propertiesin two-electron atoms/ions which include the negatively charged Ps− (e−e+e−)and H− ions, Heatom and positively charged, helium-like ions from Li+ to Ni26+. All these ions areconsidered in their ground 11S-state(s). The slowly convergent properties selected inthis study include the electron-nulceus (r2k_eN) and electron-electron (r2k_ee) expectation values for k = 2, 3, 4 and 5.