Theory of multiple ionization of xenon under strong XUV radiation and the role of the giant resonance

Resonance P Lambropoulos (1, 2) , K G Papamihail (1) , P Decleva (3)

1 Institute of Electronic Structure and Laser
2 Department of Physics [Heraklion]
3 dipartimento di scienze chimiche

We examine the conditions under which multiple ionization of Xenon, under strong radiation of photon energy 93 eV and pulse duration 10 fs, leading up to Xe 21+ can be observed. Through a set of rate equations, we show that the dominant sequential channels are sufficient for and consistent with the observed ionic species. Addressing the possible role of the giant resonance in this context, we evaluate the evolution of the neutral which is responsible for that resonance, examining its depletion during the pulse. We show that, owing to the large value of the cross section and in combination with the pulse duration, as the intensity rises towards the peak value, the neutral is depleted very early, at lower intensities, thus precluding its exposure to the higher peak intensities above 10 15 W/cm 2. But we do point out that under much shorter pulse duration, direct many-electron multiple ejection may be a possibility, but not under the presently available conditions of intensity and pulse duration at the FEL (Free Electron Laser) facilities. Theory of Multiple Ionization of Xenon under strong XUV radiation and the role of the Giant Resonance.2

Mots clés: 32.80.Rm; 32.80.Fb; 30.80.Hd; 42.50.Hz

Resonance P Lambropoulos, K G Papamihail, P Decleva. Theory of multiple ionization of xenon under strong XUV radiation and the role of the giant resonance. Journal of Physics B: Atomic, Molecular and Optical Physics, 2011, 44 (17), pp.175402. ⟨10.1088/0953-4075/44/17/175402⟩. ⟨hal-00651654⟩