Correlated charge and mass distributions from reactions ofFe56withNi58,Ni64, andSn122

First and second moments of the projectilelike fragment distributions in the $\mathrm{NZ}$ plane have been measured for the reactions of ${}_{}{}^{56}{}_{}{}^{}\mathrm{Fe}$ with ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ at 315 and 461 MeV, with ${}_{}{}^{64}{}_{}{}^{}\mathrm{Ni}$ at 464 MeV, and with ${}_{}{}^{122}{}_{}{}^{}\mathrm{Sn}$ at 320 and 460 MeV bombarding energy. Results are compared as a function of energy loss to predictions of theoretical transport calculations which include effects of the deexcitation of the excited fragments by particle evaporation. Comparisons involve no adjusted parameters. Theoretical and experimental results for second moments are in good agreement for all cases. First moments agree well with theory for ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ and ${}_{}{}^{64}{}_{}{}^{}\mathrm{Ni}$ cases, but for ${}_{}{}^{122}{}_{}{}^{}\mathrm{Sn}$ the experimental data show a drift toward higher masses that is less rapid than predicted. It is concluded that a theory employing statistical single nucleon exchange as the dominant mechanism in energy damping can generally reproduce the results of these experiments.