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          Institute: MPI für Kernphysik     Collection: Theoretical Quantum Dynamics     Display Documents



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ID: 299456.0, MPI für Kernphysik / Theoretical Quantum Dynamics
High-order above-threshold ionization in stretched molecules
Authors:Chirila, Ciprian C.; Lein, Manfred
Language:English
Date of Publication (YYYY-MM-DD):2006-11-03
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Volume:74
Start Page:1
End Page:4
Sequence Number of Article:051401
Copyright:©2006 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:By numerical solution of the time-dependent Schrödinger equation, highly accurate electron spectra are calculated for strong-field ionization of a one-dimensional H2+ molecular ion at large internuclear distances. Compared to the atomic spectra, we find additional cutoffs at high electron energies. The classical model for ionization (simple-man's model) adapted to the molecular geometry predicts cutoffs up to 50Up, where Up is the ponderomotive potential. The cutoffs correspond to various scattering scenarios of the tunneled electron from the molecular sites. For certain internuclear distances the agreement between the classical predictions and the numerical spectra is unsatisfactory. We propose a modified simple-man's model based on complex electron trajectories, allowing for electrons appearing in the continuum with nonzero initial velocity from the tunneling ionization process. Agreement of the resulting cutoffs with the numerical results is recovered.
External Publication Status:published
Document Type:Article
Communicated by:C.H. Keitel
Affiliations:MPI für Kernphysik/ Group of C.H. Keitel/Molecular Quantum Dynamics and Attosecond Physics (M. Lein)
External Affiliations:Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
Identifiers:DOI:10.1103/PhysRevA.74.051401
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