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Evidence for rescattering in intense, femtosecond laser interactions with a negative ion

Pedregosa-Gutierrez, J. and Orr, P. and Greenwood, J. and Murphy, Adrian and Costello, John T. and Zrost, K. and Ergler, T. and Moshammer, R. and Ullrich, J. (2004) Evidence for rescattering in intense, femtosecond laser interactions with a negative ion. Physical Review Letters, 93 (22). pp. 223001-1. ISSN 0031-9007

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Abstract

It is now well established that energetic electron emission, nonsequential ionization, and high harmonic generation, produced during the interaction of intense, femtosecond laser pulses with atoms (and atomic positive ions), can be explained by invoking rescattering of the active electron in the laser field, the so-called rescattering mechanism. In contrast for negative ions, the role of rescattering has not been established experimentally. By irradiating F- ions with ultrashort laser pulses, F+ ion yields as a function of intensity for both linearly and circularly polarized light have been measured. We find that, at intensities well below saturation for F+ production by sequential ionization, there is a small but significant enhancement in the yield for the case of linearly polarized light, providing the first clear experimental evidence for the existence of the rescattering mechanism in negative ions.

Item Type:Article (Published)
Refereed:Yes
Subjects:Physical Sciences > Physics
DCU Faculties and Centres:Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:The American Physical Society
Official URL:http://dx.doi.org/10.1103/PhysRevLett.93.223001
Copyright Information:© 2004 The American Physical Society
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Higher Education Authority
ID Code:15655
Deposited On:12 Aug 2010 09:58 by DORAS Administrator. Last Modified 12 Aug 2010 10:12

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