title: Enhancement and control of H2 dissociative ionization by femtosecond VUV laser pulses.
abstract: We report ab initio calculations of H2 ionization by VUV/fs 10(12) W/cm2 laser pulses including correlation and all electronic and vibrational degrees of freedom (DOF). Inclusion of the nuclear DOF leads to a substantial increase of resonance enhanced multiphoton ionization. By varying pulse duration, it is possible to control the ratio of dissociative to nondissociative ionization as well as the final H+(2) vibrational distribution. For pulses longer than 10 fs and proportional to omega>0.46 a.u., dissociative ionization entirely dominates, which is a very unusual situation in photoionization studies.
authors.affiliation: Departamento de Química, C-9, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Palacios
authors.forename: H
authors.initials: H
authors.lastname: Bachau
authors.forename: F
authors.initials: F
authors.lastname: Martín