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Time-resolved photoelectron angular distributions: concepts, applications, and directions.

Tamar Seideman¹

¹Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada. tamar.seideman@nrc.ca

Annual Review of Physical Chemistry

|April 25, 2002

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Photoelectron angular distributions (PADs) reveal molecular dynamics in pump-probe experiments. This review explores how time-resolved PADs offer insights into molecular structure and radiationless transitions.

Area of Science:

Physical Chemistry
Quantum Mechanics
Spectroscopy

Background:

Pump-probe spectroscopy utilizes ultrashort laser pulses to study ultrafast dynamics.
Photoelectron angular distributions (PADs) provide information about electronic and nuclear motion.

Purpose of the Study:

To review the application of PADs in short-pulse, pump-probe experiments.
To highlight theoretical insights, applications, and future opportunities.

Main Methods:

Theoretical analysis of time-resolved PADs.
Focus on concepts and insights gained from experimental data.

Main Results:

Time-resolved PADs are sensitive to the time-evolving rotational composition of wavepackets.

Related Experiment Videos

PADs also reflect the time-evolving electronic symmetry of molecules.

These sensitivities enable probing molecular structure, intensity effects, rotational perturbations, and radiationless transitions.

Conclusions:

PADs are a versatile probe for ultrafast molecular dynamics.
This technique offers significant potential for understanding complex photochemical processes.