Correlation problems in atomic and molec
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M. Saute; J. Paldus; J. C̆íz̆ek
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Article
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1979
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John Wiley and Sons
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English
⚖ 716 KB
## Abstract The coupled‐cluster variational‐like direct approach to the calculation of ionization and electron attachment energies and of excitation energies is applied to several π‐electron model systems, using the PPP Hamiltonian with various parametrizations. A simple approximation, which repres