Abstract
The response of nuclei to zero momentum transfer spin-isospin operators like the magnetic dipole and the Gamow-Teller operator are considered. On the basis of a non-relativistic quark model hamiltonian we derive energy-weighted sum rules for these operators. Ground-state correlations in the nucleus are treated in the random-phase approximation with a schematic baryon-baryon interaction. It is found that within reasonable limits of the coupling strength the sum rules are stable and thus can be termed model independent.
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