Coulomb singularity in the transverse momentum distribution for strong-field single ionization
| Autor: | R. Moshammer, V. L. B. de Jesus, Artem Rudenko, Joachim Ullrich, Th. Ergler, K. Zrost, Bernold Feuerstein, Bennaceur Najjari, Alexander Voitkiv, C. D. Schröter |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 38:L191-L198 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/0953-4075/38/11/l01 |
| Popis: | We present high-resolution momentum distributions of ions and electrons created in single ionization of He, Ne and Ar targets by intense (0.15–2 PW cm−2) short-pulsed (25 fs) linearly polarized laser fields in the direction perpendicular to the polarization. Instead of a Gaussian shape predicted by standard tunnelling theory, the experimental data exhibit a sharp cusp-like peak at zero transverse momentum. The comparison of experimental data with (i) calculations performed within the strong-field approximation employing a Coulomb–Volkov wavefunction to model the final electron state and (ii) results of recent semiclassical calculations, shows that the 'cusp' appears due to the long-range Coulomb interaction between the emitted electron and the remaining ion. A similar structure was previously observed for ion–atom collisions. |
| Databáze: | OpenAIRE |
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