Energy- and Angle-Resolved Femtosecond Photoelectron Spectra from Rotating Molecules

We have extended our formulation of energy- and angle-dependent pump-probe photoelectron spectroscopy for vibrational wavepackets to account for the effects of molecular rotation. We employ a classical model for rotation, which should be applicable to many cases of interest, and present some results of applications to photoelectron spectra for wavepackets on the double-minimum state of Na_2. The results provide useful insights into such time-resolved photoelectron spectra and suggest strategies for deconvolution of the vibrational and rotational content of the photoelectron signals.