Theoretical Investigation of Femtosecond-Resolved Photoelectron Spectrum of Na2 Molecules

Effect of laser fields on Na2 interaction potentials is studied by calculating the time-resolved photoelectron spectrum (TRPES) with the time-dependent wave-packet method. It is shown that the photoelectron spectrum at different delay times reflects the population in different electronic states. We inspect the periodicity of vibrational motion in neutral states, and map the vibrationalwave-packet propagation in corresponding internuclear coordinate.