Coincident fragment detection in strong field photoionization and dissociation of H2.
Electron-ion momentum spectroscopy is used to investigate the correlated electronic and nuclear motion in fragmentation of H2 in 4 x 10(14) W/cm(2), 25 fs laser pulses at 795 nm. Reaction channel dependent photoelectron spectra indicate that besides the main, stepwise H2 ionization H2(+) dissociation mechanism resulting in the products H(1s) + H(+) + e(-) a second new mechanism has to be assumed. The momentum distribution of H(+) ions in the dissociation channels H(1s) + H(+) + e(-) and 2H(+) + 2e(-) is found to be independent of the kinetic energy of the photoelectrons.
Rottke
H
H
Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin, Germany.
Trump
C
C
Wittmann
M
M
Korn
G
G
Sandner
W
W
Moshammer
R
R
Dorn
A
A
Schröter
C D
CD
Fischer
D
D
Lopez-Urrutia
J R Crespo
JR
Neumayer
P
P
Deipenwisch
J
J
Höhr
C
C
Feuerstein
B
B
Ullrich
J
J