Role of nuclear motion in double ionization of molecular hydrogen by a single photon.
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.
Horner
D A
DA
Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720, USA.
Vanroose
W
W
Rescigno
T N
TN
Martín
F
F
McCurdy
C W
CW