Effects of laser pulse duration and intensity on Coulomb explosion of CO2: signatures of charge-resonance enhanced ionization
Author(s)
Litvinyuk, IV
Bocharova, I
Sanderson, J
Kieffer, JC
Légaré, F
Griffith University Author(s)
Year published
2009
Metadata
Show full item recordAbstract
We studied laser-induced Coulomb explosion of CO2 by full triple-coincidence momentum resolved detection of resulting ion fragments. From the coincidence momentum data we can reconstruct molecular geometry immediately before explosion. We observe the dynamics of Coulomb explosion by comparing reconstructed CO2 geometries for different Ti:Sapphire laser pulse durations (at the same intensity) ranging from few cycles (7 fs) to 200 fs. We conclude that for longer pulse durations (=100 fs) Coulomb explosion proceeds through the enhanced ionization mechanism taking place at the critical O- O distance of 8 a.u., similarly ...
View more >We studied laser-induced Coulomb explosion of CO2 by full triple-coincidence momentum resolved detection of resulting ion fragments. From the coincidence momentum data we can reconstruct molecular geometry immediately before explosion. We observe the dynamics of Coulomb explosion by comparing reconstructed CO2 geometries for different Ti:Sapphire laser pulse durations (at the same intensity) ranging from few cycles (7 fs) to 200 fs. We conclude that for longer pulse durations (=100 fs) Coulomb explosion proceeds through the enhanced ionization mechanism taking place at the critical O- O distance of 8 a.u., similarly to well known charge-resonance enhanced ionization (CREI) in H2.
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View more >We studied laser-induced Coulomb explosion of CO2 by full triple-coincidence momentum resolved detection of resulting ion fragments. From the coincidence momentum data we can reconstruct molecular geometry immediately before explosion. We observe the dynamics of Coulomb explosion by comparing reconstructed CO2 geometries for different Ti:Sapphire laser pulse durations (at the same intensity) ranging from few cycles (7 fs) to 200 fs. We conclude that for longer pulse durations (=100 fs) Coulomb explosion proceeds through the enhanced ionization mechanism taking place at the critical O- O distance of 8 a.u., similarly to well known charge-resonance enhanced ionization (CREI) in H2.
View less >
Conference Title
Journal of Physics: Conference Series
Volume
194
Issue
3
Subject
Atomic and molecular physics
Condensed matter physics
Other physical sciences