Skip to Main content Skip to Navigation
Theses

Étude de la dynamique de photodissociation de molécules ionisées en couche interne par spectroscopie de moment

Abstract : We experimentally studied the relaxation of atomic and molecular systems following core-shell photoionization in tender X-ray regime (2-12 keV). The various processes of de-excitation have been studied by the coincidence measurements of the velocity vector of emitted electrons and ions allowing access to the vector correlations between the electrons and ions. New experimental results on argon combined with theoretical model developed by our collaborators have shown the effective existence of angular momentum transfer due to the Post-collision interaction (PCI) between the photoelectron and the Auger electron. Then, the CS2 three-body fragmentation dynamics was interpreted using a combination of geometric and kinematic observables. We have shown that it is possible to separate the different types of fragmentation in case of the mixed pathway. We also showed the presence of massive concerted pathways after the dissociation of CH3I molecule. Moreover, we have observed the formation of multiply charged ions where the total charge induced has reached +15 by single photon absorption. Finally, the comparison of experimental data with Coulomb explosion model allowed us to estimate the average displacement of the molecule during relaxation.
Document type :
Theses
Complete list of metadatas

Cited literature [146 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02890862
Contributor : Abes Star :  Contact
Submitted on : Monday, July 6, 2020 - 3:37:17 PM
Last modification on : Thursday, July 9, 2020 - 4:08:00 AM
Long-term archiving on: : Monday, September 28, 2020 - 3:23:41 PM

File

ZMERLI_Moustafa_2019.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02890862, version 1

Citation

Moustafa Zmerli. Étude de la dynamique de photodissociation de molécules ionisées en couche interne par spectroscopie de moment. Chimie théorique et/ou physique. Sorbonne Université, 2019. Français. ⟨NNT : 2019SORUS430⟩. ⟨tel-02890862⟩

Share

Metrics

Record views

63

Files downloads

18