title: Disentangling the volume effect through intensity-difference spectra: application to laser-induced dissociation of H2+.
abstract: An intensity-difference spectrum method is developed to disentangle the intensity volume effect inherent in focused laser beam interaction with gas-phase matter. This method is applicable to a Gaussian beam of constant axial intensity, which keeps the exact contribution from a predetermined intensity range and eliminates the contributions from lower intensities. We apply this method to the angularly resolved kinetic energy release spectrum of laser-induced dissociation of H2+. The difference spectrum at higher intensities is found to be dominated by the bond-softening process, and the distribution shifts to lower energy and becomes narrower with increasing intensity.
authors.affiliation: J R Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA. pqwang@phys.ksu.edu
authors.forename: Pengqian
authors.initials: P
authors.lastname: Wang
authors.forename: A Max
authors.initials: AM
authors.lastname: Sayler
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Carnes
authors.forename: Brett D
authors.initials: BD
authors.lastname: Esry
authors.forename: Itzik
authors.initials: I
authors.lastname: Ben-Itzhak