A method for excited states is givepn on the bzsis of the symmetry-adapted-cluster (SAC) expansion method. It is based on the fact that the SAC expansion method &es inci;lentally a set of excited functions which satisfies the Brillouin theorem with the ground state.
Cluster expansion of the wavefunction: Ionizations and some low-energy excitations of naphthalene
β Scribed by H. Nakatsuji; M. Komori; O. Kitao
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 358 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Ionizations and some lower singlet valence and Rydberg excitations of naphthalene are studied by the SAC/SAC CI method with 100 (44 n + 56 o) active MOs. A systematic assignment of the ionization spectra is given. In particular, assignments are given for the peaks in the 13-20 eV region. A large o-electron correlation effect is found for the valence excited B,. state, together with a large effect of the d, polarization function. The controversy concerning the assignment of the Rydberg nd,, orbitals is resolved: Robin's assignment of the 3d, orbital at 6.73 eV above the ground state is supported.
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