Journal of Chemical Physics, Vol.110, No.24, 11928-11935, 1999
The breaking of the backward-forward symmetry in the angular distribution of m(j)-selected photofragments
We present calculations on the angular distributions of m(j)-selected photofragments (with m(j) being the projection of the fragments' internal angular momentum on a space-fixed z-axis). We show that the proper analysis of such experiments [based on G. G. Balint-Kurti and M. Shapiro, Chem. Phys. 61, 137 (1981)], involves coherent lambda not equal lambda' terms (with lambda-the "helicity"-being the projection of the fragment angular momentum on the recoil direction). The involvement of these coherent terms leads, amongst other things, to the creation of "orientation," i.e., the backward-forward asymmetry, in the fragments' angular distributions. Thus we demonstrate that the detection of polarization in one (internal) variable-the internal rotation, creates a correlated orientation in another (external) variable-the recoil angular distribution.