Dalitz plot analysis of Coulomb exploding O{sub 3} in ultrashort intense laser fields

Journal Article · Fri Sep 21 04:00:00 EDT 2007 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2766718· OSTI ID:21024187

Matsuda, Akitaka; Takahashi, Eiji J; Hishikawa, Akiyoshi ^[1]

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1. Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585 (Japan) and Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585, Japan and The Graduate University for Advanced Studies, SOKENDAI, Myodaiji, Okazaki, Aichi 444-8585 (Japan) and Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585 (Japan)

The three-body Coulomb explosion of O{sub 3}, O{sub 3}{sup 3+}{yields}O{sup +}+O{sup +}+O{sup +}, in ultrashort intense laser fields (2x10{sup 15} W/cm{sup 2}) is studied with two different pulse durations (9 and 40 fs) by the coincidence momentum imaging method. In addition to a decrease in the total kinetic energy release, a broadening in the Dalitz plot distribution [Philos. Mag. 44, 1068 (1953)] is observed when the pulse duration is increased from 9 to 40 fs. The analysis based on a simple Coulomb explosion model shows that the geometrical structure of O{sub 3} remains almost unchanged during the interaction with the few-cycle intense laser fields, while a significant structural deformation along all the three vibrational coordinates, including the antisymmetric stretching coordinate, is identified in the 40 fs intense laser fields. The observed nuclear dynamics are discussed in terms of the population transfer to the excited states of O{sub 3}.

• OSTI ID: 21024187
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 11 Vol. 127; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
DALITZ PLOT
DEFORMATION
DISSOCIATION
KINETIC ENERGY
LASER RADIATION
MOLECULAR STRUCTURE
OXYGEN IONS
OZONE
PHOTOLYSIS
THREE-BODY PROBLEM
VIBRATIONAL STATES