Stuttgart 2012 – scientific programme
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A: Fachverband Atomphysik
A 28: Poster: Interaction of matter with ions
A 28.4: Poster
Wednesday, March 14, 2012, 16:30–19:00, Poster.V
Observation of the 2p3/2-2s1/2 Radiative Transition in Li-like Uranium using the Resonant Coherent Excitation in Si-crystal. — •Alena Ananyeva1,2, Toshiyuki Azuma3,5, Harald Bräuning2, Angela Bräuning-Demian2, Denis Dauvergne4, Christina Dimopoulou2, Yasuyuki Kanai5, Carl Kleffner2, Yuji Nakano3,5, Yuri Pivovarov6, Marcus Steck2, Shintaro Suda3, and Yasunori Yamazaki5,7 — 1Goethe Universität Frankfurt am Main, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 3Tokyo Metropolitan University, Japan — 4IPNL - Institut de Physique Nucléaire de‘Lyon, France — 5RIKEN, Tokyo, Japan — 6National ResearchTomsk Polytechnic University, Russia — 7University of Tokyo, Japan
Taking advantage of the cooled, relativistic ion beams delivered by the Experimental Storage Ring (ESR) at GSI, Darmstadt the energy of the 1s22p3/2- 1s22s1/2 transition in Li-like U ions was measured by using the resonant excitation of ions in a Si-crystal in channelling conditions. The excitation of the projectile traversing a solid target with an ordered structure is induced with great probability by the periodic potential defined by the atoms of the crystal lattice when the oscillation frequency of the crystal field fits the energy difference between two levels of the ion. The resonant character of the process enables the determination of transition energy with high precision. The present scheme is quite universal being applicable for various ions and for a wide range of transition energies in the field of atomic as well as nuclear physics.