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LETTER TO THE EDITOR

Lifetime interference effect on the angular distribution of the Auger electron emission following resonant Auger decay from 2pto4s photoexcited Ar

K Ueda et al 1999 J. Phys. B: At. Mol. Opt. Phys. 32 L291-L296   doi: 10.1088/0953-4075/32/13/102  Help

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K Ueda-+, Y Shimizu-+, N M Kabachnik++, I P Sazhina§, R Wehlitz||, U Becker, M Kitajima+ and H Tanaka+
-+ Research Institute for Scientific Measurements, Tohoku University, Sendai 980-8577, Japan
++ Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld, Germany
§ Institute of Nuclear Physics, Moscow State University, Moscow 119899, Russia
|| Photon Factory, KEK, Tsukuba 305-0801, Japan
¶ Fritz-Haber-Institut der Max-Planck-Gesellshaft, 14195 Berlin, Germany
+ Department of Physics, Sophia University, Tokyo 102-8554, Japan

Abstract. A strong alternation of Auger electron angular distributions is observed for the second-step Auger emission of Ar following 2p3/2to4s and 2p1/2to4s excitation. This effect, which gives rise not only to anisotropy suppression but also to the strong enhancement, is shown to originate from a coherent population of the Auger initial state due to the short decay time of the second-step Auger transition, the so-called lifetime interference effect.

Print publication: Issue 13 (14 July 1999)
Received 16 April 1999

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