DISTRIBUTED APPROXIMATING FUNCTION-APPROACH TO TIME-DEPENDENT WAVE-PACKET PROPAGATION IN MORE THAN ONE-DIMENSION - INELASTIC COLLINEAR ATOM DIATOM COLLISIONS

The distributed approximating function (DAF) approach to time-dependent wave-packet propagation in the coordinate representation is utilized to treat collinear, inelastic atom-diatom collisions. The resulting discretized DAF (DDAF) 2D-propagator is highly banded, leading to an extremely efficient computational strategy. The approach is illustrated with application to the atom-harmonic oscillator collision system treated earlier by Secrest and Johnson [J. Chem. Phys. 45, 4556 (1966)].