Experimental study of structure in enhanced ionization of H$_{2}^{+}$ in intense ultrashort laser pulses
I. Ben-Itzhak,
P.Q. Wang,
A.M. Sayler,
K.D. Carnes,
B.D. Esry,
A.S. Alnaser,
B. Ulrich,
X.M. Tong,
I.V. Litvinyuk,
C.M. Maharjan,
P. Ranitovic,
T. Osipov,
R. Ali,
S. Ghimire,
Z. Chang,
C.D. Lin,
C.L. Cocke
( J.R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan KS 66506, USA)
Charge resonance enhanced ionization (CREI) of H$_{2}^{+}$ in
intense
ultrashort laser pulses was measured using molecular dissociation
imaging of
an H$_{2}^{+}$ beam and with a pump-probe technique using
COLTRIMS on an
H$_{2}$ target. The dependence of the ionization probability on the
internuclear distance is determined independently from both
measurements
using a simple model for the initial dissociation step. Both data
sets lead
to a similar R-dependence which indicates that ionization is
enhanced at
large internuclear distances as predicted by theory [1]. However, in
contrast to the predictions for a double peak structure, only one
broad peak
is observed. [1] T. Zuo and A.D. Bandrauk, Phys. Rev. A
\textbf{52}, R2511
(1995)
This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Submitted to DAMOP, May 2006 in Knoxville, TN.
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy, and by
the National Science Foundation.
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