Bound states in screened and bare Coulomb potentials: A nonorthogonal CI-based route to effective Hamiltonians for two-electron systems
✍ Scribed by Pinaki Chaudhury; S. P. Bhattacharyya
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 218 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0020-7608
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✦ Synopsis
One-and two-electron bound states in screened and bare Coulomb potentials are calculated by adopting a discretized multiconfiguration generator Ž . coordinate GC method which leads to an iterative nonorthogonal configuration interaction procedure with the optimization of GCs. The GCs are optimized either by the method of simulated annealing or by a genetic algorithm. Critical scanning lengths for which bound states disappear in one-electron atoms are computed. A noninteracting model Hamiltonian for a two-electron atom based on the idea of screened Coulomb interaction is proposed and used for calculating electric dipole polarizability and establishing the threshold value of z for the appearance of autoionizing ground state of two-electron systems.