An SCF technique for excited states
β Scribed by Renato Colle; Alessandro Fortunelli; Oriano Salvetti
- Publisher
- Springer
- Year
- 1987
- Tongue
- English
- Weight
- 602 KB
- Volume
- 71
- Category
- Article
- ISSN
- 1432-2234
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract One can treat the linear variation calculation by the perturbation expansion; on the other hand, one can also relate the perturbed wave function for the __m__th state to the __m__th eigenvector and justify the upper bound nature of the perturbation calculations for excited states. One c
The form&m recently developed by Poplc and co-workers for restricted Ilartree-Fock calculattons on high spin ogcn sliells is extended to ;1 general trcatmcnt of singly cxclted states. The limrtations of the method and possible alternativr approachcs are briefly discussed.
## Abstract A practical scheme for the calculation of excited states of the same symmetry as a given reference state is outlined in the context of the HartreeβFock method. In order to prevent the excited state from βcollapsingβ into a lowerβlying state, the prediagonalized Fock matrix is diagonaliz
SCF CI bendi-g curxes for the ground and first four low lying singlet excited states of HCN were calculated using the e.xperimental equiliirium distances\_ No other r A" state appears close to 1 r A". We agree with former theoretical studies suggesting that one of the fmt two low lying excited state