Issue 15, 2024

Real-time dynamics of vibronic wavepackets within Rydberg and ion-pair states of molecular iodine

Abstract

Real-time dynamics of vibrationally and electronically excited I2 molecules has been investigated experimentally using the pump–probe technique. A 2-photon excitation was performed either at 269 nm or 266 nm. An electronic and vibrational wavepacket was built as coherent superposition of a few (269 nm excitation) or many (266 nm excitation) Rydberg states of the Image ID:d4cp00118d-t1.gif and Image ID:d4cp00118d-t2.gif series partly coupled with ion-pair states. The probe operated by ionisation or photodetachement. The energy and angular distribution of the resulting photoelectrons, I+ photocations and I photoanions were monitored. During the dynamics that is turned on by the pump excitation, the wavepacket splits and explores a variety of electronic states of Rydberg and ion-pair character. The experimental results were complemented by molecular dynamics calculations. This provided invaluable information to identify wavepacket motion along ion-pair potential energy curves.

Graphical abstract: Real-time dynamics of vibronic wavepackets within Rydberg and ion-pair states of molecular iodine

Supplementary files

Article information

Article type
Paper
Submitted
10 1 2024
Accepted
14 3 2024
First published
14 3 2024
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2024,26, 11516-11530

Real-time dynamics of vibronic wavepackets within Rydberg and ion-pair states of molecular iodine

J. Mestdagh, L. Barreau and L. Poisson, Phys. Chem. Chem. Phys., 2024, 26, 11516 DOI: 10.1039/D4CP00118D

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