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 vibrational
wave-packet propagation in corresponding internuclear coordinate.