Berlin 2005 – wissenschaftliches Programm

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A: Atomphysik

A 13: Poster HU 2

A 13.14: Poster

Dienstag, 8. März 2005, 08:30–18:30, Poster HU

Interference between Direct and Resonant Kr 3d⁹5p Raman Auger Decay Modes — •Karl-Heinz Schartner¹, Rüdiger Schill¹, Sascha Mickat¹, Sven Kammer¹, Lutz Werner², Stephan Klumpp², Arno Ehresmann², Hans Schmoranzer², Viktor Sukhorukov³, and Boris Lagutin³ — ¹I.Physikalisches Institut Universität Giessen, D-35392 Giessen — ²Fachbereich Physik, Technische Universität Kaiserslautern, D-67653 Kaiserslautern — ³Rostov State University of Transport Communications, 344038 Rostov-on-Don, Russia

The energy dependence of alignment and orientation of Kr+ 4p⁴5p states was measured across the resonantly excited Kr 3d⁹5p ¹P - states with a bandwidth within their natural line width. Interference processes between overlapping resonances due to lifetime broadening were observed which confirmed our predictions that resonances separated by even 15 times the natural line width can not be regarded as isolated. In this contribution we test experimentally our prediction that interference between direct and resonant excitation produces an energy dependence for the photon induced population of the Kr+ 4p⁴(¹D)5p ²P_3/2 state within the line width of the 3d_5/2⁹5p_3/2 resonance centred at 91.2 eV. I.e. the two-step model separating resonant excitation and Auger decay is not applicable in this case.