Time-independent mean field description of collisions

Products of single-particle orbitals are used as trial functions in a variational principle for the calculation of multistep nuclear collisions. The resulting dynamical equations are time-independent and generalize Hartree equations to nondiagonal mean fields with inhomogeneous source terms. These equations are solved for a $\text{p +}{}^3\text{H → p + n + d}$ breakup reaction.