Correlated electron and nuclear dynamics in strong field photoionization of H+2

28th International Conference on Photonic, Electronic and Atomic Collisions

Martín, F.^1,2 ; Silva, R.E.F.^1 ; Rivière, P.^1 ; Catoire, F.^3 ; Bachau, H.^3

Departamento de Quimica, Universidad Autónoma de Madrid, Módulo 13, MADRID

28049, Spain^1

Instituto Madrileño de Estudios Avanzados en Nanociencia, Cantoblanco, MADRID

28049, Spain^2

Centre des Lasers Intenses et Applications, CNRS-CEA, University Bordeaux i, 351 Cours de la Libération, Talence

F-33405, France^3

关键词: Correlated electrons;    Ionization mechanisms;    Multiphoton ionization;    Nuclear dynamics;    Proton kinetic energies;    Strong field;    Strong field ionization;    Theoretical study;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032017/pdf
DOI  :  10.1088/1742-6596/488/3/032017

来源: IOP

【 摘 要 】

We present a theoretical study of H+2ionization under strong femtosecond pulses by using a method designed to extract correlated 2D photoelectron and proton kinetic energy spectra. There appear two different ionization mechanisms in which electrons and nuclei do not share the energy in the same way. Electrons produced in multiphoton ionization share part of their energy with the nuclei, leading to energy-conservation fringes in the 2D spectra. In contrast, tunneling electrons lead to fringes whose position does not depend on the proton kinetic energy. This suggests that the correlation between electron and nuclear dynamics in strong field ionization is more complex than expected.