Resonant excitation during strong-field dissociative ionization

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Title Resonant excitation during strong-field dissociative ionization
Author Alnaser, A.S.; Zamkov, M.; Tong, X.M.; Maharjan, C.M.; Ranitovic, P.; Cocke, C.L.; Litvinyuk, Igor
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Year Published 2005
Place of publication Ridge, NY
Publisher American Physical Society
Abstract We studied dissociative ionization of oxygen by intense femtosecond laser pulses with central wavelengths between 550 and 1800 nm. We measured kinetic energy release spectra and angular distributions of fragments resulting from symmetric dissociation of doubly charged molecular ions (O-2(2+)-> O++O+ channel). In the kinetic energy release spectra we identified a number of distinct excited states of the molecular ion. Angular distributions for all but one of those states were consistent with recollision excitation following single ionization of O-2. For the remaining (B (3)Pi(g)) excited state we observed a characteristic resonant dependence of its relative yield on the central optical frequency of the pulse, with the yield peaking at around 890 nm. This presents unambiguous evidence in support of importance of resonant excitation channels in strong field ionization of molecules.
Peer Reviewed Yes
Published Yes
Alternative URI http://10.1103/PhysRevA.72.041402
Volume 72
Issue Number 4
Page from 041402-1
Page to 041402-3
ISSN 1050-2947
Date Accessioned 2010-08-09
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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