title: Large nondipole effects in the angular distributions of K-shell photoelectrons from molecular nitrogen.
abstract: Measurements of angular distributions of K-shell electrons photoejected from molecular nitrogen are reported which reveal large deviations at relatively low photon energies (Planck's omega < or = 500 eV) from emission patterns anticipated from the dipole approximation to interactions between radiation and matter. A concomitant theoretical analysis incorporating the effects of electromagnetic retardation attributes the observed large nondipole behaviors in N2 to bond-length-dependent terms in the E1 [multiply sign in circle] (E2,M1) photoelectron emission amplitudes which are indicative of a potentially universal nondipole behavior in molecular photoionization.
authors.affiliation: Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003, USA.
authors.forename: O
authors.initials: O
authors.lastname: Hemmers
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: P
authors.initials: P
authors.lastname: Focke
authors.forename: I A
authors.initials: IA
authors.lastname: Sellin
authors.forename: D W
authors.initials: DW
authors.lastname: Lindle
authors.forename: J C
authors.initials: JC
authors.lastname: Arce
authors.forename: J A
authors.initials: JA
authors.lastname: Sheehy
authors.forename: P W
authors.initials: PW
authors.lastname: Langhoff