Berlin 2001 – wissenschaftliches Programm

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A: Atomphysik

A 13: Photoionisation I (joint session A and MO)

A 13.8: Vortrag

Donnerstag, 5. April 2001, 17:30–17:45, H1012

Investigation of the 1s Cascade Decay of Mg with Photoelectron-Photoion-Coincidence Measurements — •Nico Schmidt, Birgit Kanngießer, Sandra Brünken, Kai Godehusen, Wolfgang Malzer, and Peter Zimmermann — Institut für Atomare und Analytische Physik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany

We have investigated the 1s decay of free Mg atoms with a photoelectron- photoion coincidence method at the new U41-PGM beamline of BESSY II. As Mg is the first element in the periodic table showing a cascade decay for the 1s radiative transition, also the Mg 2p and 2s decay was investigated. With our final ion-charge resolving electron spectroscopy, an advanced version of the photoelectron-photoion coincidence method, branching ratios and transition probabilities were determined for the whole cascade decay.

The results are compared to measurements on solids and to calculated values.