Experimental observation of initial-state effects in photo-double-ionization of Ne 2s

Bolognesi, P., Flammini, R., Kheifets, A., Bray, I. and Avaldi, L. (2004) Experimental observation of initial-state effects in photo-double-ionization of Ne 2s. Physical Review A - Atomic, Molecular, and Optical Physics, 70 (6).

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Abstract

The triple-differential cross section (TDCS) for the photo-double-ionization of Ne and He leading to the Ne2+(2s−22p6) and He2+(1s−2) states have been measured 20 eV above their respective thresholds in equal energy sharing conditions. The experimental results show that the Ne TDCS’s are qualitatively different from the He ones. A calculation using the convergent close coupling method with a He-like final state and different initial-state wave functions clearly shows that the observed differences can be ascribed to an initial-state effect.