Tracing direct and sequential two-photon double ionization of $\mathrm{D_2}$ in femtosecond extreme-ulraviolet laser pulses
| Autor: | Jiang, Y. H., Rudenko, A., Plésiat, E., Foucar, L., Kurka, M., Kühnel, K. U., Ergler, Th., Pérez-Torres, J. F., Martín, F., Herrwerth, O., Lezius, M., Kling, M., Titze, J., Jahnke, T., Dörner, R., Sanz-Vicario, J. L., Schöffler, M., Van Tilborg, J., Belkacem, A., Ueda, K., Zouros, T. J. M., Düsterer, S., Treusch, R., Schröter, C. D., Moshammer, R., Ullrich, J. |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Physical review / A 81(2), 021401 (2010). doi:10.1103/PhysRevA.81.021401 |
| DOI: | 10.1103/PhysRevA.81.021401 |
| Popis: | Physical review / A 81(2), 021401(R) (2010). doi:10.1103/PhysRevA.81.021401 Two-photon double ionization (TPDI) of $D_2$ is studied for 38-eV photons at the Free Electron Laser in Hamburg (FLASH). Based on model calculations, instantaneous and sequential absorption pathways are identified as separated peaks in the measured $D^+ + D^+$ fragment kinetic energy release (KER) spectra. The instantaneous process appears at high KER, corresponding to ionization at the molecule’s equilibrium distance, in contrast to sequential ionization mainly leading to low-KER contributions. Measured fragment angular distributions are ingood agreement with theory. Published by APS, College Park, Md. |
| Databáze: | OpenAIRE |
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