Holding molecular dications together in strong laser fields

Journal Article · Sat Apr 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787042

Chunlei, Guo ^[1]

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1. Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

Metastable channel of doubly ionized carbon monoxide, CO{sup 2+}, was scantly seen in previous strong-field experiments at the visible wavelength region, but was commonly observed using single high-energy photon or electron excitation. For the first time with near-IR ultrashort-pulse radiation, we observe an abundance of CO{sup 2+}. We show that CO{sup 2+} results from nonsequential double ionization, while its dissociation counterpart, C{sup +}+O{sup +}, results from sequential processes, and CO{sup 2+} can be obtained through either single high-energy photon or electron excitation or multiphoton ionization with ultrashort pulses before a critical internuclear distance is reached. Our study demonstrates the experimental conditions to converge the outcomes from two vastly different regimes, namely, multiphoton excitation and ionization in strong fields and single high-energy photon or electron excitation and ionization in weak fields.

• OSTI ID: 20787042
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON IONS
CARBON MONOXIDE
CATIONS
COBALT IONS
DISSOCIATION
DISTANCE
ELECTRONS
EXCITATION
LASER RADIATION
METASTABLE STATES
MULTI-PHOTON PROCESSES
OXYGEN IONS
PHOTOIONIZATION
PHOTOLYSIS
PHOTON-MOLECULE COLLISIONS
PHOTONS
PULSES
VELOCITY
WAVELENGTHS