Two- and Three-Body Photodisintegration Cross Sections ofH3andHe3

Electric-dipole photodisintegration cross sections of ${}_{}{}^3{}_{}{}^{}\mathrm{H}$ and ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ into deuteron plus nucleon and into three nucleons are calculated using simple zero-range forms for the initial- and final-state wave functions. Final-state interactions between nucleon pairs in $S$ states are taken into account. Shape fits to the experimental data are obtained, but the required normalization of the ground-state wave function is found to differ between two- and three-body breakup.