Dynamic modification of the fragmentation of autoionizing states of O{sub 2}{sup +}

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.053406· OSTI ID:22093555

Cao, W.; Laurent, G.; De, S.; Ray, D.; Kling, M. F.; Ben-Itzhak, I.; Cocke, C. L. ^[1]; Schoeffler, M.; Bocharova, I. A.; Weber, Th.; Belkacem, A.; Rescigno, T. N. ^[2]; Jahnke, T.; Stuck, C.; Doerner, R. ^[3]; Alnaser, A. S. ^[4]; Landers, A. L. ^[5]; Orel, A. E. ^[6]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506 (United States)
2. Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720 (United States)
3. Institut fuer Kernphysik, University of Frankfurt, D-60438 Frankfurt (Germany)
4. Physics Department, American University of Sharjah, Sharjah (United Arab Emirates)
5. Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)
6. Department of Applied Science, University of California, Davis, California 95616 (United States)

The dynamic process of fragmentation of excited states of the molecular oxygen cation is investigated in a two-part study. First, using monochromatic 41.6 eV radiation and cold-target recoil-ion momentum spectroscopy detection of O{sup +} + O{sup +} ion pairs and associated electrons, we establish that this channel is populated only by an indirect process enabled by autoionization of excited oxygen atoms and identify the final active potential curves. Second, we probe the dynamics of this process using an attosecond pulse train of 35-42 eV EUV followed by an intense IR laser pulse. The results are compared with a model calculation.

• OSTI ID: 22093555
• Journal Information: Physical Review. A, Vol. 84, Issue 5; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
AUTOIONIZATION
CATIONS
ELECTRONS
EV RANGE
EXCITED STATES
EXTREME ULTRAVIOLET RADIATION
ION PAIRS
MOLECULAR IONS
MONOCHROMATIC RADIATION
OXYGEN
OXYGEN IONS
POTENTIALS
PULSES
RECOILS
SPECTROSCOPY