IR-assisted ionization of helium by attosecond extreme ultraviolet radiation

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Title IR-assisted ionization of helium by attosecond extreme ultraviolet radiation
Author Ranitovic, P.; Tong, X.M.; Gramkow, B.; De, S.; Depaola, B.; Singh, K.P.; Cao, W.; Magrakvelidze, M.; Ray, D.; Bocharova, I.; Mashiko, H.; Sandhu, A.; Gangon, E.; Murnane, M.M.; Kapteyn, H.C.; Litvinyuk, Igor; Cocke, C.L.
Journal Name New Journal of Physics
Year Published 2010
Place of publication United Kingdom
Publisher Institute of Physics Publishing Ltd.
Abstract Attosecond science has opened up the possibility of manipulating electrons on the ir fundamental timescales. Here, we use both theory and experi- ment to investigate ionization dynamics in helium on the attosecond timescale by simultaneously irradiating the atom with a soft x-ray attosecond pulse train (APT) and an ultrafast lase rpulse. Because the APT has resolution in both energy and time,we observe processes that could not be observed without resolu- tion in both domains simultaneously. We show that resonant absorption is impor- tant in the excitation of helium and that small changes in energies of harmonics that comprise the APT can result in large changes in the ionization process. With the help of theory, ionization pathways for the infrared-assisted excitation and ionization of helium by extreme ultraviolet (XUV) attosecond pulses have been identified and simple model interpretations have been developed that should be of general applicability to more complex systems (Zewail A 2000 J. Phys. Chem. A 1045660–94).
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2010 Institute of Physics Publishing. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 12
Page from 013008-1
Page to 013008-12
ISSN 1367 -2630
Date Accessioned 2010-08-02
Language en_AU
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Atomic and Molecular Physics
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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