Dynamic modification of the fragmentation of CO{sup q+} excited states generated with high-order harmonics

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.043410· OSTI ID:21450802

Cao, W; De, S; Singh, K P; Chen, S; Laurent, G; Ray, D; Ben-Itzhak, I; Cocke, C L ^[1]; Schoeffler, M S; Belkacem, A; Osipov, T; Rescigno, T ^[2]; Alnaser, A S ^[3]; Bocharova, I A ^[1]; Zherebtsov, S ^[4]; Kling, M F ^[1]; Litvinyuk, I V ^[1]

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1. J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas, 66506 (United States)
2. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
3. Physics Department, American University of Sharjah, Sharjah (United Arab Emirates)
4. Max-Planck Institute of Quantum Optics, Hans-Kopfermann-Strasse 1, D-85748, Garching (Germany)

The dynamic process of fragmentation of CO{sup q+} excited states is investigated using a pump-probe approach. EUV radiation (32-48 eV) generated by high-order harmonics was used to ionize and excite CO molecules and a time-delayed infrared (IR) pulse (800 nm) was used to influence the evolution of the dissociating multichannel wave packet. Two groups of states, separable experimentally by their kinetic-energy release (KER), are populated by the EUV and lead to C{sup +}-O{sup +} fragmentation: direct double ionization of the neutral molecule and fragmentation of the cation leading to C{sup +}-O*, followed by autoionization of O*. The IR pulse was found to modify the KER of the latter group in a delay-dependent way which is explained with a model calculation.

• OSTI ID: 21450802
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CARBON COMPOUNDS
CARBON IONS
CARBON MONOXIDE
CARBON OXIDES
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
DISSOCIATION
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EXCITED STATES
HARMONICS
INFRARED RADIATION
IONIZATION
IONS
KINETIC ENERGY
LASER RADIATION
MOLECULES
OSCILLATIONS
OXIDES
OXYGEN COMPOUNDS
OXYGEN IONS
PULSES
RADIATIONS
TIME DELAY
WAVE PACKETS