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
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- RERO DOC 8229
- DOI 10.1139/p07-002
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300328
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