DIRECT DETERMINATION OF NUMBER DENSITY-ANGLE-VELOCITY DISTRIBUTIONS IN THE CENTER-OF-MASS FRAME OF SCATTERING PROCESSES BY GATED 2-DIMENSIONAL IMAGING TECHNIQUES

Number density-angle-velocity distributions of scattered products from photofragmentation, inelastic and reactive collisions in the center-of-mass frame can be directly measured by utilizing laser-induced-fluorescing illumination and gated two-dimensional imaging techniques. The physical principle behind this direct method and its experimental realization are elucidated. An illustrative example from the photofragmentation process is analyzed accordingly.