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Indian Journal of Physics

, Volume 91, Issue 8, pp 845–851 | Cite as

Excited state electron affinity calculations for aluminum

  • Adnan Yousif HusseinEmail author
Original Paper
  • 66 Downloads

Abstract

Excited states of negative aluminum ion are reviewed, and calculations of electron affinities of the states \((3s^23p^2)^1D\) and \((3s3p^3){^5}{S}{^\circ }\) relative to the \((3s^23p)^2P^\circ\) and \((3s3p^2)^4P\) respectively of the neutral aluminum atom are reported in the framework of nonrelativistic configuration interaction (CI) method. A priori selected CI (SCI) with truncation energy error (Bunge in J Chem Phys 125:014107, 2006) and CI by parts (Bunge and Carbó-Dorca in J Chem Phys 125:014108, 2006) are used to approximate the valence nonrelativistic energy. Systematic studies of convergence of electron affinity with respect to the CI excitation level are reported. The calculated value of the electron affinity for \(^1D\) state is 78.675(3) meV. Detailed Calculations on the \(^5S^\circ\) state reveals that is 1216.8166(3) meV below the \(^4P\) state.

Keywords

Configuration interaction Electron affinity CI by part Excited atomic states 

PACS Nos

32.10.Hq 

Notes

Acknowledgements

The author would like to acknowledge the support and encouragement of Professor Carlos F. Bunge during 5 years of exciting and fruitful collaboration. The support of TWAS-CONACYT through postdoctoral grant is gratefully acknowledged. The author thanks the Instituto de Física, Universidad Nacional Autónoma de México for computer services.

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Copyright information

© Indian Association for the Cultivation of Science 2017

Authors and Affiliations

  1. 1.Department of Physics, College of EducationUniversity of MustansiriyahBaghdadIraq

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