Results of large-basis shell-model calculations for nuclei with A = 7-10 are presented. The effective interactions used in the study were derived microscopically from the Reid93 potential and take into account the Coulomb potential as well as the charge dependence of T = 1 partial waves. For A = 7, a 6h#OMEGA# model space. It is demonstrated that the shell model combined with microscopic effective interactions derived from modern nucleon-nucleon potentials is capable of providing good agreement with the experimental properties of the ground state as well as with those of the low-lying excited states. In the context of the calculations for A = 10 isobars we study in detail the isospin-mixing correction to the ~(10)C -> ~(10) B Fermi matrix element.
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