title: Pump-probe photoionization study of the passage and bifurcation of a quantum wave packet across an avoided crossing.
abstract: The application of femtosecond pump-probe photoelectron spectroscopy to directly observe vibrational wave packets passing through an avoided crossing is investigated using quantum wave packet dynamics calculations. Transfer of the vibrational wave packet between diabatic electronic surfaces, bifurcation of the wave packet, and wave packet construction via nonadiabatic mixing are shown to be observable as time-dependent splittings of peaks in the photoelectron spectra.
authors.affiliation: Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, Komaba, 153-8902, Tokyo, Japan.
authors.forename: Yasuki
authors.initials: Y
authors.lastname: Arasaki
authors.forename: Kazuo
authors.initials: K
authors.lastname: Takatsuka
authors.forename: Kwanghsi
authors.initials: K
authors.lastname: Wang
authors.forename: Vincent
authors.initials: V
authors.lastname: McKoy