Decays of the psi'(3684) to other charmonium states

An experimental study of the decays of the psi'(3684) to other charmonium states is reported. The decays of 106 psi'(3684)'s were observed with the SLAC-LBL Mark II detector at the e+e- storage ring SPEAR. Branching ratios have been measured for psi'(3684) decays to γ chi where the chi decays to γ psi(3095) or to hadrons. An upper limit of 0.13% is set on the branching ratio for psi' → γ chi(3455) → γγ psi(3095); this is a factor of 6 less than the branching ratio measured by a previous less sensitive experiment. The decay psi' → γ eta/sub c/, eta/sub c/ → hadrons is investigated. The decay psi' → π0psi, which violates isospin conservation, is observed with a branching ratio of (0.15+-0.06)%