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Ellipticity-dependent ionization/dissociation of carbon dioxide in strong laser fields |
| Zhang Jun-Feng (张军峰)a b, Ma Ri (马日)a b, Zuo Wan-Long (左万龙)a b, Lv Hang (吕航)a b, Huang Hong-Wei (黄红卫)a b, Xu Hai-Feng (徐海峰)a b, Jin Ming-Xing (金明星)a b, Ding Da-Jun (丁大军)ab |
a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
b Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China |
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Abstract Ionization and dissociation of linear triatomic molecules, carbon dioxide, are studied in 50-fs 800-nm strong laser fields using time-of-flight mass spectrometer. The yields of double charged ions CO22+ and various fragment ions (CO+, On+, and Cn+ (n=1, 2)) are measured as a function of ellipticity of laser polarization in the intensity range from 5.0× 1013 W/cm2 to 6.0× 1014 W/cm2. The results demonstrate that non-sequential double ionization, which is induced by laser-driven electron recollision, dominates double ionization of CO2 in the strong IR laser field with intensity lower than 2.0×1014 W/cm2. The electron recollision could also have contribution in strong-field multiple ionization and formation of fragments of CO2 molecules. The present study indicates that the intensity and ellipticity dependence of ions yields can be used to probe the complex dynamics of strong-field ionization/dissociation of polyatomic molecules.
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Received: 23 September 2014
Revised: 16 October 2014
Accepted manuscript online:
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PACS:
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33.80.Rv
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(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB922200) and the National Natural Science Foundation of China (Grant Nos. 11034003 and 11274140). |
Corresponding Authors:
Xu Hai-Feng
E-mail: xuhf@jlu.edu.cn
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Cite this article:
Zhang Jun-Feng (张军峰), Ma Ri (马日), Zuo Wan-Long (左万龙), Lv Hang (吕航), Huang Hong-Wei (黄红卫), Xu Hai-Feng (徐海峰), Jin Ming-Xing (金明星), Ding Da-Jun (丁大军) Ellipticity-dependent ionization/dissociation of carbon dioxide in strong laser fields 2015 Chin. Phys. B 24 033302
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