Journal article

Many-body calculation of helium ¹D–³D term intervals for 1snd (n = 12 ∼ 20) high Rydberg states

  • He, Liming Department of Physics, East China University of Science and Technology, Shanghai, P. R. China -
  • Cao, Wei Department of Physics, East China University of Science and Technology, Shanghai, P. R. China - Department of Physics, University of Fribourg, Switzerland
    2006
Published in:
  • Canadian Journal of Physics. - 2006, vol. 84, no. 12, p. 1097-1106
English With many-body perturbation theory, ¹D–³D term intervals of helium 1snd (n = 12 ∼ 20) configurations are calculated. Based on two different models, Rayleigh-Schrodinger perturbation expansion terms consisting of bound states only, and those of continua are evaluated, respectively. As for bound states, zeroth-order wave functions are strictly generated from self-iteration solutions of the Hartree equation and residues of infinite expansion series are dealt with by the integral processing method, while a simplified hydrogen potential is adopted to get the continua. Using Rayleigh–Schrodinger expansions, we evaluate exchange energy up to third-order terms. It is found that level splittings are mainly attributed to summations over bound states. The fine-structure level splittings yielded here are found to agree quite well with experimental results.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/300328
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