The postcollision interaction observed at high-energy ion-atom collisions

Abstract

The shape of the Ne KL 2L 3( 1D 2) Auger line has been investigated in the 5.5 MeV/u N 2+ — and Ne 3+ -Ne collisions. An asymmetric line shape has been found showing a tail on the high-energy side of the line, while the shape of the line due to the 1s2s2p( 4P)-1s 2( 1S) transition from the Li-like metastable initial state measured in the 5.5 MeV/u Ar 16+ -Ne collision was symmetrical. The line shape calculated according to a postcollision effect due to the slowly receding ejected electrons shows a very good agreement with the measured line shapes.