Abstract
A relativistic RPA is derived starting from a model Lagrangean with four-fermion coupling. The exchange terms are taken exactly into account by exploiting Fierz relations. The model is applied to negative parity states of16O. Exchange terms turn out to give large contributions.
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References
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Supported by Deutsche Forschungsgemeinschaft
We thank B.A. Nikolaus for providing us with the single-particle wave functions and for useful discussions. One of us (T.H.) would like to thank Prof. H.A. Weidenmüller for the hospitality at MPI, Heidelberg.