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Multiple ionization of Ne and Ar by intense 25 fs laser pulses: few-electron dynamics studied with ion momentum spectroscopy

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Zrost,  K.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Rudenko,  A.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ergler,  T.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Feuerstein,  B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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de Jesus,  V. L. B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Schröter,  C. D.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Moshammer,  R.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ullrich,  J.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Citation

Zrost, K., Rudenko, A., Ergler, T., Feuerstein, B., de Jesus, V. L. B., Schröter, C. D., et al. (2006). Multiple ionization of Ne and Ar by intense 25 fs laser pulses: few-electron dynamics studied with ion momentum spectroscopy. Journal of Physics B: Atomic, Molecular and Optical Physics, 39(13), S371-S380. doi:doi:10.1088/0953-4075/39/13/S10.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-7FC7-3
Abstract
Momentum distributions of Ne2–5+ and Ar2–7+ ions created by 795 nm, 25 fs laser pulses at intensities of up to 20 PW cm-2 have been measured using a 'reaction microscope'. The experimental results indicate that below 2.0 PW cm-2 the production of Ne3–4+ ions is dominated by n-fold electron impact ionization (e, ne) collisions of the recolliding electron with its parent ion. Multiple ionization of Ar is found to be dominated by mechanisms involving a combination of recollision-induced and field-induced steps as well as intermediate excitations in the whole range of intensities where non-sequential ionization occurs. Whereas a clear double peak structure characteristic for electron recollision was observed in the momentum distributions of up to Ne5+, no signatures of non-sequential ionization were found in the spectra of Ar ions with the charge state higher than 4.