Dissociation dynamics of the diamondoid adamantane upon photoionization by XUV femtosecond pulses

Sylvain Maclot (1) , Jan Lahl (1) , Jasper Peschel (1) , Hampus Wikmark (1) , Piotr Rudawski (1) , Fabian Brunner (1) , Hélène Coudert-Alteirac (1) , Suvasthika Indrajith (2) , Bernd Huber (2, 3) , Sergio Díaz-Tendero (4) , Néstor Aguirre (4) , Patrick Rousseau (5, 2, 3) , Per Johnsson (1)

1 Skane University Hospital [Lund]
2 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
3 AMA - Atomes, Molécules et Agrégats
4 UAM - Universidad Autónoma de Madrid
5 NU - Normandie Université

This work presents a photodissociation study of the diamondoid adamantane using extreme ultraviolet femtosecond pulses. The fragmentation dynamics of the dication is unraveled by the use of advanced ion and electron spectroscopy giving access to the dissociation channels as well as their energetics. To get insight into the fragmentation dynamics, we use a theoretical approach combining potential energy surface determination, statistical fragmentation methods and molecular dynamics simulations. We demonstrate that the dissociation dynamics of adamantane dications takes place in a two-step process: barrierless cage opening followed by Coulomb repulsion-driven fragmentation.

Domaines: Physique [physics]; Agrégats Moléculaires et Atomiques [physics.atm-clus]; Chimie-Physique [physics.chem-ph]; Optique [physics.optics]; Physique de l'espace [physics.space-ph]

Sylvain Maclot, Jan Lahl, Jasper Peschel, Hampus Wikmark, Piotr Rudawski, et al.. Dissociation dynamics of the diamondoid adamantane upon photoionization by XUV femtosecond pulses. Scientific Reports, 2020, 10 (1), pp.2884. ⟨10.1038/s41598-020-59649-1⟩. ⟨hal-03668782⟩