The photon and ${}^3\mathrm{He}$ analyzing powers as well as spin correlation coefficients in the semiexclusive three-body photodisintegration of ${}^3\mathrm{He}$ are investigated for incoming photon laboratory energies $E_{\gamma }=12,40$, and 120 MeV. The nuclear states are obtained by solving three-body Faddeev equations with the AV18 nucleon-nucleon potential alone or supplemented with the UrbanaIX three-nucleon force. Explicit π- and ρ-meson exchange currents are taken into account, but we also compare to other models of the electromagnetic current. In some kinematical conditions we have found strong effects of the three-nucleon force for the ${}^3\mathrm{He}$ analyzing power and spin correlation coefficients, as well strong sensitivities to the choice of the currents. This set of predictions should be a useful guidance for the planning of measurements. In addition, we compare our results for two-body ${}^3\mathrm{He}$ breakup induced by polarized photons with a few existing data.

• Received 24 June 2005

DOI:https://doi.org/10.1103/PhysRevC.72.044002