Effects of orbital symmetries in dissociative ionization of molecules by few-cycle laser pulses

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Title Effects of orbital symmetries in dissociative ionization of molecules by few-cycle laser pulses
Author Alnaser, A.S.; Maharjan, C.M.; Tong, X.M.; Ulrich, B.; Ranitovic, P.; Shan, B.; Chang, Z.; Lin, C.D.; Cocke, C.L.; Litvinyuk, Igor
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Year Published 2005
Place of publication Ridge, NY
Publisher American Physical Society
Abstract We have measured angular distributions of ion fragments produced in dissociative double ionization of CO, CO2, and C2H2 by intense ultrashort laser pulses. This report extends similar recent studies of O2 and N2 to a wider set of molecules. We found that for sub-10-fs pulses of sufficiently low intensity the fragments' angular distributions for all studied molecules are determined by angular dependence of the first ionization step. Those experimental angular distributions were in good agreement with angular dependent ionization probabilities calculated with the molecular tunneling ionization theory. The measured angular distributions directly reflect the symmetry of the corresponding molecular orbitals. For higher laser intensities and longer pulse durations, dynamic alignment and postionization alignment start to affect the angular distributions and ion fragments are preferentially ejected along the laser-polarization direction.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1103/PhysRevA.71.031403
Volume 71
Issue Number 3
Page from 031403-1
Page to 031403-4
ISSN 1050-2947
Date Accessioned 2010-08-09
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
URI http://hdl.handle.net/10072/39386
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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