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Phys. Rev. A 78, 063419 (2008) [7 pages]

Elusive enhanced ionization structure for H2+ in intense ultrashort laser pulses

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I. Ben-Itzhak*, P. Q. Wang†, A. M. Sayler, K. D. Carnes, M. Leonard‡, B. D. Esry, A. S. Alnaser§, B. Ulrich**, X. M. Tong††, I. V. Litvinyuk, C. M. Maharjan, P. Ranitovic, T. Osipov‡‡, S. Ghimire, Z. Chang, and C. L. Cocke
J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA

Received 21 August 2008; published 19 December 2008

Enhanced ionization of H2+ in intense ultrashort laser pulses was measured using molecular dissociation imaging of an H2+ beam and with a pump-probe technique using cold target recoil ion momentum spectroscopy on a D2 target. Both measurements show a broad, single-peak distribution for enhanced ionization, in contrast to the double-peak structure predicted by “frozen” nuclei theory. This calculated double-peak structure is most likely washed out by nuclear motion and to a lesser extent by intensity averaging.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.063419
DOI:
10.1103/PhysRevA.78.063419
PACS:
33.80.−b, 32.80.Fb

*Corresponding author: ibi@phys.ksu.edu

†Present address: Department of Physics, Western Illinois University, Macomb, IL 61455.

‡Present address: Department of Physics, University of California at Berkeley, Berkeley, CA 94720.

§Present address: Physics Department, American University of Sharjah, Sharjah, U.A.E.

**Present address: Institut für Kernphysik, University Frankfurt, Max von Laue Str. 1, D-60438 Frankfurt, Germany.

††Present address: Institute of Materials Science, Graduate School of Pure and Applied Sciences, and Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.

‡‡Present address: Lawrence Berkeley National Laboratory, Berkeley, California 94720.

 
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