Vibrationally resolved structure in O2+ dissociation induced by intense ultrashort laser pulses
Author(s)
Zohrabi, M
McKenna, J
Gaire, B
Johnson, Nora G
Carnes, KD
De, S
Bocharova, IA
Magrakvelidze, M
Ray, D
Litvinyuk, IV
Cocke, CL
Ben-Itzhak, I
Griffith University Author(s)
Year published
2011
Metadata
Show full item recordAbstract
Laser-induced dissociation of O+ 2 is studied in the strong-?eld 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 ...
View more >Laser-induced dissociation of O+ 2 is studied in the strong-?eld 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 ??- 1??-a mechanism equivalent to bond softening in H+.
View less >
View more >Laser-induced dissociation of O+ 2 is studied in the strong-?eld 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 ??- 1??-a mechanism equivalent to bond softening in H+.
View less >
Journal Title
Physical Review A
Volume
83
Subject
Atomic and Molecular Physics
Mathematical Sciences
Physical Sciences
Chemical Sciences