Sum rules for isospin centroids in pick-up reactions on general multishell target states

Sum rule equations for pick-up reactions are presented for the first time for the energy centroids of states both for the isospin T<(≡ T0 − 12) and T>(≡ T0 + 12) of the final nucleus when a nucleon is picked up from a general multishell target state with isospin T0. These equations contain two-body correlation terms, 〈H0t〉, which, at the present moment, are difficult to handle analytically. These terms are managed by combining these equations with the known stripping reactions equations. Sample applications of these equations to experimental data are presented.