Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 39: Precision spectroscopy of atoms and ions IV (with Q)
A 39.6: Vortrag
Donnerstag, 20. März 2014, 11:45–12:00, BEBEL SR140/142
New even and odd energy levels of the La atom — Bettina Gamper1, Tobias Binder1, Feyza Güzelcimen2, Gönül Basar2, Sophie Kröger3, and •Laurentius Windholz1 — 1Institut für Experimentalphysk, TU Graz, Petersgasse 16, A-8010 Graz, Österreich — 2Istanbul University, Faculty of Science, Physics Department, Tr-34134 Vezneciler, Istanbul, Turkey — 3Hochschule für Technik und Wissenschaft Berlin, Fachbereich 1, Wilhelminenhofstr. 75A, D-12459 Berlin, Deutschland
The investigation of structures in the optogalvanic spectrum of La, which can not be interpreted as transitions between known energy levels, may lead to the discovery of up to now unknown energy levels. Usually, the lowering of the fluorescence intensity of a strong La line marks the lower level of the excited transition, and the new upper level energy can be calculated using the centre of gravity excitation wave number. However, to be sure that the level really exists, some additional excitations from other known lower levels are necessary. Levels found in Graz, performing excitation in the wavelength range 690-560 nm, are confirmed in Istanbul by means of a Ti:Sa laser system (720-950 nm).