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The dipole polarizability of Li−

✍ Scribed by S. Canuto; W. Duch; J. Geertsen; F. Müller-Plathe; J. Oddershede; G.E. Scuseria


Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
600 KB
Volume
147
Category
Article
ISSN
0009-2614

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✦ Synopsis


We have calculated the lowest excitation energies and the static dipole polarizability of Li-as well as the electron affinity of Li using current quantum-chemical methods, including full CI. We have studied the convergence of the polarizability with the size of the orbital basis set. We find that electron correlation has a dramatic effect on the polarimbility reducing it to roughly half its SCP value. MBPT calculations through fourth-order and perturbative propagator methods give an unsatisfactory description of the electron correlation whereas polarization propagator methods based on a coupled-cluster reference state give a polarizability in fair agreement with the full CI result.


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