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Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
Shape-amplitude representation of N-particle photofragmentation processes
M Walter1, A Meremianin, J S Briggs
1Theoretische Quantendynamik, Universität Freiburg, Hermann-Herder-Strasse 3, D-79104 Freiburg, Germany.
Physical Review Letters
|July 15, 2003
Summary
This study derives a new form for multiparticle photofragmentation matrix elements. This approach simplifies the derivation of selection rules for fragmentation processes.
Area of Science:
- Atomic and Molecular Physics
- Quantum Chemistry
- Chemical Physics
Background:
- The multiparticle photofragmentation matrix element describes how molecules break apart after absorbing light.
- Existing parametrizations can be complex, hindering the derivation of fundamental selection rules.
Purpose of the Study:
- To derive a general form for the multiparticle photofragmentation matrix element in the dipole approximation.
- To introduce a novel coordinate system for simplifying the analysis of fragmentation dynamics.
- To facilitate a more transparent derivation of selection rules.
Main Methods:
- Derivation of the multiparticle photofragmentation matrix element using the dipole approximation.
- Establishment of a coordinate system based on two noncolinear momentum vectors.
- Extraction of shape amplitudes dependent on body-fixed quantities.
Main Results:
- A new general form for the photofragmentation matrix element is presented.
- Shape amplitudes are extracted, depending only on the lengths and mutual angles of momentum vectors.
- This parametrization simplifies the derivation of selection rules.
Conclusions:
- The new approach offers a more straightforward method for understanding photofragmentation dynamics.
- The derived shape amplitudes provide insights into the fragmentation configuration.
- This work simplifies the derivation and understanding of selection rules in multiparticle photofragmentation.
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