Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: Poster: Photoionization

A 27.9: Poster

Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais

The 1s⁻¹2s⁻¹,2p⁻¹ shake up satellites in Argon — •R. Püttner¹, T. Marchenko², R. Guillemin², R. K. Kushawaha², L. Journel², G. Goldsztejn², D. W. Lindle⁴, M. N. Piancastelli^2,5, J.-P. Rueff^2,3, D. Ceolin³, and M. Simon^2,3 — ¹Freie Universität Berlin, Germany — ²CNRS and UPMC, UMR 7614, Paris , France — ³Synchrotron SOLEIL, Saint-Aubin, France — ⁴University of Nevada, Las Vegas, USA — ⁵Uppsala University, Sweden

Using a new experimental setup for high-resolution HAXPES in the gas phase, which is mounted at the GALAXIES beamline of SOLEIL, we investigated the 1s⁻¹2s⁻¹,2p⁻¹ shake up structures of Argon, The spectrum of the 1s⁻¹2p⁻¹ shake up satellites is dominated by the np (n=4 to 7) Rydberg series converging towards the ionization thresholds ¹P₁ and ³P_2,1,0, which are determined with high accuracy. Below the 1s⁻¹2s⁻¹ thresholds the spectrum is dominated by the broad 1s⁻¹2s⁻¹ (^1,3S) 4s Rydberg states which are split by approximately 16 eV. Moreover, a number of narrow lines are observed above the 1s⁻¹2p⁻¹ (^1,3P) thresholds. Based on their linewidths and splittings these narrow lines are assigned to 1s⁻¹2p⁻¹ (^1,3P) 3p⁻¹ n^′l^′n^′′l ^′′ final states populated via double shake processes. In addition, 1s⁻¹2p⁻¹ the shake up satellites are also observed in molecules (S 1s⁻¹2p⁻¹ in H₂S, Cl 1s⁻¹2p⁻¹ in CH₃Cl and CCl₄) showing that this is a rather general effect. This observation opens the exciting new possibility to study single-site double core-hole (SS DCH) states in Si, P, S, and Cl containing molecules using conventional photoelectron spectroscopy at synchrotron radiation facilities.