title: Role of nuclear motion in double ionization of molecular hydrogen by a single photon.
abstract: We examine the origin of recently observed variations with internuclear distance (R) of the fully differential cross sections for double ionization of aligned H2 by absorption of a single photon. Using the results of fully converged numerical solutions of the Schrödinger equation, we show that these variations arise primarily from pronounced differences in the R dependence of the parallel and perpendicular components of the ionization amplitude. We also predict that R dependences should be readily observable in the asymmetry parameter for photodouble ionization, even in experimental measurements that are not differential in the energy sharings between ejected photoelectrons.
authors.affiliation: Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Horner
authors.forename: W
authors.initials: W
authors.lastname: Vanroose
authors.forename: T N
authors.initials: TN
authors.lastname: Rescigno
authors.forename: F
authors.initials: F
authors.lastname: Martín
authors.forename: C W
authors.initials: CW
authors.lastname: McCurdy