Ionization and Dissociation of O$_{2}^{+}$ and N$_{2}^{+}$ in Intense Short Pulse Laser Fields
A. M. Sayler,
R. Cabrera-Trujillo,
P. Q. Wang,
B. Gaire,
Nora G. Johnson,
M. Leonard,
E. Parke,
K. D. Carnes,
B. D. Esry,
I. Ben-Itzhak
( J.R. Macdonald Laboratory, Physics Department, Kansas State University)
The momentum distributions for ionization and dissociation of O$_{2}^{+}$
and N$_{2}^{+}$ exposed to intense short laser pulses have been studied
experimentally using a 3D coincidence momentum imaging method. Both 790nm
laser pulses of 8 to 120fs at intensities up to 10$^{15}$ W/cm$^{2}$ and
395nm pulses of 45fs at intensities up to 10$^{13}$ W/cm$^{2}$ have been
used. The momentum distributions yield a rich structure in kinetic energy
release and angular distribution that is used to deduce the dissociation
pathways. The angular distributions for these two molecules, which are
theoretically predicted to be significantly different [1], will be
presented.
[1] X. M. Tong, Z. X. Zhao, A. S. Alnaser, S. Voss, C. L. Cocke and C. D.
Lin, J. Phys. B \textbf{38}, 333 (2005)
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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