Interrogating Molecular-Ion Beams by Ultrashort Intense Laser Pulses

Journal Article · Tue Mar 10 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3120000· OSTI ID:21289510

Ben-Itzhak, I; McKenna, J; Sayler, A M; Gaire, B; Johnson, Nora G; Parke, E; Carnes, K D ^[1]

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1. J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 (United States)

We have experimentally explored laser-induced dissociation and ionization of diatomic molecular ions, such as H{sub 2}{sup +}, N{sub 2}{sup +}, CO{sup +} and ND{sup +}, using coincidence 3D momentum imaging. The vibrationally excited molecular-ion beam (5-10 keV) is crossed by an ultrafast intense laser beam (typically 7-50 fs, 10{sup 13}-10{sup 16} W/cm{sup 2} at 790 and 395 nm). The resulting fragments, including neutral fragments, are recorded in coincidence by a time- and position-sensitive detector. Complete angular and kinetic energy release (KER) distributions are reconstructed from the measured momentum vectors of the fragments. For example, this experimental method enabled the observation of a surprising high KER component in N{sub 2}{sup +} dissociation despite its overlap in KER with the ionization channel.

• OSTI ID: 21289510
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1099; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
CARBON MONOXIDE
DISSOCIATION
HYDROGEN IONS 2 PLUS
ION BEAMS
ION SOURCES
KEV RANGE
KINETIC ENERGY
LASER RADIATION
NITROGEN IONS
PHOTOIONIZATION
PHOTON-ION COLLISIONS
PULSED IRRADIATION
PULSES
VIBRATIONAL STATES