Large nondipole effects in the angular distributions of K-shell photoelectrons from molecular nitrogen.
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.
Hemmers
O
O
Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003, USA.
Wang
H
H
Focke
P
P
Sellin
I A
IA
Lindle
D W
DW
Arce
J C
JC
Sheehy
J A
JA
Langhoff
P W
PW