Few-Femtosecond Isotope Effect in Polyatomic Molecules Ionized by Extreme Ultraviolet Attosecond Pulse Trains - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry A Année : 2022

Few-Femtosecond Isotope Effect in Polyatomic Molecules Ionized by Extreme Ultraviolet Attosecond Pulse Trains

Résumé

Following ionization by an extreme ultraviolet (XUV) attosecond pulse train, a polyatomic molecule can be promoted to more-than-one excited states of the residual ion. The ensuing relaxation dynamics is often facilitated by several reaction coordinates, making them difficult to disentangle by usual spectroscopic means. Here, we show that in atto-chemistry isotope labelling can be an efficient tool for unraveling the relaxation pathways in highly excited photo-ionized molecules. Employing a XUV pump pulse and a near-infrared probe pulse, we found the nuclear as well as coupled electron-nuclear dynamics in ethylene to be almost 40% faster compared to its deuterated counterpart. The findings, which are supported by advanced non-adiabatic dynamics calculations, led to the identification of the relevant nuclear coordinates controlling the relaxation. Our experiment highlights the relevance of ultrashort XUV pulses to capture the isotopic effect in few-femtosecond molecular photo-dynamics.
Fichier principal
Vignette du fichier
Ethylene_main_JPCA.pdf (1.52 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03766564 , version 1 (01-09-2022)

Identifiants

Citer

Morgane Vacher, Alexie Boyer, Vincent Loriot, Franck Lépine, Saikat Nandi. Few-Femtosecond Isotope Effect in Polyatomic Molecules Ionized by Extreme Ultraviolet Attosecond Pulse Trains. Journal of Physical Chemistry A, 2022, 126 (34), pp.5692-5701. ⟨10.1021/acs.jpca.2c03487⟩. ⟨hal-03766564⟩
55 Consultations
71 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More