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Related Experiment Video

Updated: Jul 11, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

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Published on: February 4, 2017

Dalitz plot analysis of Coulomb exploding O3 in ultrashort intense laser fields.

Akitaka Matsuda¹, Eiji J Takahashi, Akiyoshi Hishikawa

¹Institute for Molecular Science, National Institutes of Natural Sciences, Myodaiji, Okazaki, Aichi 444-8585, Japan.

The Journal of Chemical Physics

|September 25, 2007

Summary

Investigating ozone (O3) in intense laser fields reveals pulse duration impacts its Coulomb explosion. Longer pulses cause structural deformation, affecting molecular dynamics and energy release.

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Area of Science:

Atomic and Molecular Physics
Chemical Physics
Laser-Matter Interactions

Background:

Ozone (O3) dissociation dynamics under intense laser fields are complex.
Understanding molecular fragmentation mechanisms is crucial for controlling chemical reactions.

Purpose of the Study:

To investigate the effect of laser pulse duration on the three-body Coulomb explosion of O3.
To analyze the structural dynamics and nuclear motion of O3 during intense laser field interaction.

Main Methods:

Coincidence momentum imaging technique.
Utilizing ultrashort intense laser fields with varying pulse durations (9 fs and 40 fs).
Analysis using a simple Coulomb explosion model and Dalitz plot distributions.

Main Results:

Increasing pulse duration from 9 fs to 40 fs decreased total kinetic energy release.
Dalitz plot distribution broadened with longer pulse durations.
O3 structure remained largely unchanged with 9 fs pulses but deformed significantly with 40 fs pulses.

Conclusions:

Laser pulse duration significantly influences the Coulomb explosion dynamics and structural evolution of O3.
Population transfer to excited states plays a role in the observed nuclear dynamics.
Structural deformation is more pronounced with longer pulse durations, indicating altered molecular response.