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Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 4: Precision spectroscopy of atoms and ions I

A 4.2: Vortrag

Montag, 14. März 2011, 14:15–14:30, BAR 205

Laser Spectroscopy on Highly Charged Fe13+ Ions — •Kirsten Schnorr, Volkhard Mäckel, José Ramón Crespo López-Urrutia, and Joachim Ullrich — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

We report on the first successful laser spectroscopic measurements on highly charged Fe13+ trapped in an Electron Beam Ion Trap (EBIT) at MPIK. The forbidden M1 transition (1s2 2s2 2p6 3s2 3p)   2P3/2   −   2P1/2 has been excited resonantly with a tunable dye laser, while monitoring the fluorescence photons.

The studied line is the well-known green coronal line of Fe XIV, and therefore of great interest for comparison with astronomical data, since our measured wavelength is not affected by the Doppler shift.

Compared to our earlier results on Ar13+ ions, we have been able to enhance the resolution of the method and improve evaporative cooling. The Zeeman splitting of the transition due to the magnetic field in the EBIT has been clearly resolved. In addition we have observed optical pumping between the π1/2 and π3/2 Zeeman levels.

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