Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: Precision spectroscopy of atoms and ions I (with Q)

A 27.7: Vortrag

Mittwoch, 2. März 2016, 16:15–16:30, f428

Comparison of the Lγ(2,3) line shape for Ba2+ compounds and metal — •Malkhaz Jabua, Detlev Gotta, and Thomas Strauch — Institüt für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Deutschland

The Lγ(2,3) line from Ba2+ compounds shows a complex structure. Nevertheless, both peak energy and shape of the complex are apparently unaffected by the nature of the anion. Therefore, a comparison measurement was performed using metallic barium. For the measurement was used the Johann spectrometer at the institute of nuclear physics (IKP) at Forschungszentrum Jülich (FZJ). The set-up allows to record simultaneously an energy interval covering the complete structure Ba Lγ(2,3) structure. As Bragg crystal a spherically bent quartz crystal was used. The diffracted X-rays were recorded with a 24 mm x 24 mm charge-coupled device having a pixel size of 40 micrometer x 40 micrometer. The spectra of metallic Ba complete a series of measurements including the spectra from the salts BaCl2, BaCO3, Ba(OH)2, and BaSO4. The X-ray energies were determined to an accuracy of about 40 meV. The talk aims to describe the experimental setup, measurement techniques, and to present the data analysis methodology and some recent results.