Vibrationally resolved structure in O2+ dissociation induced by intense ultrashort laser pulses

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Title Vibrationally resolved structure in O2+ dissociation induced by intense ultrashort laser pulses
Author Zohrabi, M.; McKenna, J.; Gaire, B.; Johnson, N.G.; Carnes, K.D.; De, S.; Bocharova, I. A.; Magrakvelidze, M.; Ray, D.; Litvinyuk, Igor; Cocke, C.L.; Ben-Itzhak, I.
Journal Name Physical Review A
Year Published 2011
Place of publication United States
Publisher American Physical Society
Abstract Laser-induced dissociation of O+ 2 is studied in the strong-field limit using two independent methods, namely a crossed laser–ion-beam coincidence 3D momentum imaging method and a supersonic gas jet velocity map imaging technique (790 and 395 nm, 8–40 fs, ∼10 15 W/cm2 ). The measured kinetic energy release spectra from dissociation of O+ 2 and dissociative ionization of O2 reveal vibrational structure which persists over a wide range of laser intensities. The vibrational structure is similar for O+ 2 produced incoherently in an ion source and coherently by laser pulses. By evaluation of the potential energy curves, we assign the spectral energy peaks to dissociation of the v = 10–15 vibrational states of the metastable a 4 ��u state via the dissociation pathway |a 4 ��⟩ → |f 4 ��− 1ω⟩—a mechanism equivalent to bond softening in H+.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1103/PhysRevA.83.053405
Volume 83
Page from 053405-1
Page to 053405-6
ISSN 1094-1622
Date Accessioned 2011-08-03
Date Available 2011-09-22T06:51:29Z
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
URI http://hdl.handle.net/10072/40940
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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