Details
| Original language | English |
|---|---|
| Article number | 051401 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 74 |
| Issue number | 5 |
| Publication status | Published - 3 Nov 2006 |
| Externally published | Yes |
Abstract
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 50 Up, 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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 74, No. 5, 051401, 03.11.2006.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-order above-threshold ionization in stretched molecules
AU - Chirilǎ, Ciprian C.
AU - Lein, Manfred
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/11/3
Y1 - 2006/11/3
N2 - 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 50 Up, 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.
AB - 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 50 Up, 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.
UR - http://www.scopus.com/inward/record.url?scp=33750582232&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.74.051401
DO - 10.1103/PhysRevA.74.051401
M3 - Article
AN - SCOPUS:33750582232
VL - 74
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 5
M1 - 051401
ER -