DPG Phi
Verhandlungen
Verhandlungen
DPG

Stuttgart 2012 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

A: Fachverband Atomphysik

A 30: Precision spectroscopy of atoms and ions II

A 30.3: Talk

Thursday, March 15, 2012, 11:30–11:45, V47.03

Accurate spectroscopic references near 488 nm — •Sebastian Albrecht1, Heiko Jestädt1, Sanah Altenburg1, Tobias Murböck1, Manuel Vogel1, Gerhard Birkl1, and the SPECTRAP collaboration21Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt — 2GSI, Planckstraße 1, 64291 Darmstadt

Several current experimental ventures such as the study of the hyperfine transition of highly charged 209Bi82+ ions or the excitation of Rydberg states in atomic rubidium strongly profit from a spectroscopic reference at wavelengths of 480 to 490 nm. Molecular tellurium provides a map of recorded spectra in this wavelength region [1].

We operate a frequency-quadrupled laser system for the generation of light at a wavelength of 244 nm for 209Bi82+ spectroscopy [2]. The blue light available after the first frequency-doubling stage allows us to record tellurium spectra with improved accuracy. Previous measurements of the 1S-2S transition of muonium, deuterium and hydrogen as well as coinciding reference lines of an Ar+ laser have lead to calibrated tellurium resonances. Using these sub-Megahertz precise lines we can generate a continuous spectrum of tellurium with a span of 1.4 THz around 488 nm. This easily can be expanded to other wavelength regions in the blue for extended frequency calibration.

[1] J. Cariou and P. Luc, Atlas du spectre d’absorption de la molecule de tellure (Laboratoire Aime-Cotton, Paris, 1980)

[2] S. Albrecht, S. Altenburg, C. Siegel, N. Herschbach, G. Birkl, Appl. Phys. B, DOI: 10.1007/s00340-011-4732-8 (2011)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2012 > Stuttgart