Comparison Study of Atomic and Molecular Single Ionization in the Multiphoton Ionization Regime

Journal Article · Fri Jun 23 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.243002· OSTI ID:20777293

Jian, Wu; Heping, Zeng; Chunlei, Guo ^[1]

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

In this Letter, we report, for the first time in the multiphoton ionization regime, a comparison study of single-electron ionization of diatomic molecules versus rare gas atoms with virtually the same ionization potentials. In comparing N{sub 2}{sup +} to Ar{sup +}, a higher ion signal is seen in N{sub 2}{sup +} compared to Ar{sup +} for linear polarization but the difference vanishes in circularly polarized light. In comparing O{sub 2}{sup +} to Xe{sup +}, we observe a suppression in O{sub 2}{sup +} compared to Xe{sup +} for both linear and circular polarization but this suppression exhibits an intensity dependence; i.e., there is little suppression for O{sub 2}{sup +} at the lowest intensity range, but the suppression becomes increasingly stronger as the laser intensity increases. The multielectron screening model is used to discuss possible mechanisms of this intensity dependent suppression in O{sub 2}{sup +} in the multiphoton ionization regime.

• OSTI ID: 20777293
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOMS
ELECTRONS
IONIZATION POTENTIAL
LASERS
MOLECULES
NITROGEN IONS
OXYGEN IONS
PHOTOIONIZATION
POLARIZATION
SIGNALS
VISIBLE RADIATION
XENON IONS