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A: Fachverband Atomphysik
A 21: Interaction with Strong or Short Laser Pulses II
A 21.2: Talk
Wednesday, March 4, 2009, 17:00–17:15, VMP 6 HS-C
Study of multiple ionization of Xe induced by intense XUV femtosecond laser pulse — •Roland Guichard, Ulf Saalmann, and Jan-Michael Rost — Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany
Recently, an experiment performed at the FLASH source of Hamburg showed that xenon atoms irradiated with intense XUV femtosecond laser pulses can be ionized up to Xe21+ [1]. Contrary to an experiment performed with a conventional IR laser [2] where multiple ionization is understood within tunneling and rescattering framework, the previous can neither be interpreted within the perturbative nor the non-perturbative theories of laser-atom interaction. Furthermore, the XUV frequency is in the range of the well-known giant resonance of the Xe 4d shell [3,4] which renders the dynamics of the very first ionization steps unclear. To shed more light onto these processes, we develop a multielectronic treatment based on time-dependent density functional theory. First results and computational issues will be presented in the talk.
[1] A.A. Sorokin, S.V. Bobashev, T. Fiegl, K. Tiedtke, H. Wabnitz, and M. Richter. Phys. Rev. Lett., 99 (2007)
[2] K. Yamakawa, Y.Akahane, Y. Fukuda, M. Aoyama, N. Inoue, H. Ueda, and T. Utsumi. Phys. Rev. Lett., 92 (2004)
[3] R. Haensel, G. Keitel, P. Schreiber, and C. Kunz. Phys. Rev., 188 (1969)
[4] A. Zangwill and P. Soven. Phys. Rev. A, 21 (1980)