Single-particle formulation of electron-atom scatterings with strong correlation effects
✍ Scribed by Yukap Hahn
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 913 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0003-4916
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✦ Synopsis
The continuum shell model with configuration interactions is reformulated in terms of the commuting single-particle projection operators. Diagonalization of the energy submatrix for the target state configurations constructed from the single-particle basis provides improved threshold energies and allows a simple form of open-channel projection operators. The continuum electron is treated by solving a set of coupled integrodifferential equations with complete exchange symmetry. The correlation effect is included as an effective distortion potential which is to be estimated variationally using either the single-particle or the Hylleraas form of wave functions. The nonorthogonality of the exchange channel wave functions, the calculation of resonance energies and their widths, and approximate bounds on scattering parameters are discussed. Two-and three-electron scattering systems are considered in some detail.