Complete determination of the photoionization dynamics of a polyatomic molecule.: II.: Determination of radial dipole matrix elements and phases from experimental photoelectron angular distributions from (A)over tilde1Au acetylene

We present a fit to photoelectron angular distributions (PADs) measured following the photoionization of rotationally selected A (1)A(u) state acetylene. In the case of the 4(1) (2)Sigma(-)(u) vibronic state of the ion, we are able to use this fit to make a complete determination of the radial dipole matrix elements and phases connecting the prepared level to each photoelectron partial wave. We have also investigated other Renner-Teller subbands with a view to disentangling geometrical and dynamical contributions to the resulting PADs. (C) 2007 American Institute of Physics.