Darmstadt 2008 – scientific programme
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A: Fachverband Atomphysik
A 23: Precision spectroscopy II
A 23.6: Talk
Thursday, March 13, 2008, 15:15–15:30, 3C
Precision Measurements of Metastable Hydrogen and Deuterium with a modified Lamb-shift Polarimeter — •M. Westig1, R. Engels1, K. Grigoryev1,2, M. Mikirtychyants1,2, H. Paetz gen. Schieck3, F. Rathmann1, G. Schug1, H. Stroeher1, V. Trofimov2, and A. Vasilyev2 — 1Institut für Kernphysik, Forschungszentrum Jülich, Leo-Brandt-Str. 1, 52425 Jülich, Germany — 2Petersburg Nuclear Physics Institut, Orlova Rosha 2, 188300 Gatchina, Russia — 3Institut für Kernphysik, Universität zu Köln, Zülpicher Str.77, 50937 Köln, Germany
Precision spectroscopy of hydrogen and deuterium is an established method to test bound state quantum electrodynamics (bsqed). State of the art theoretical atomic physics calculations obtain precise values from bsqed for both atomic systems, which provide a real challenge to experimentalists. We are setting up a spectroscopy experiment for metastable hydrogen and deuterium atoms in the IKP of FZ-Jülich. With a spinfilter as a part of a Lamb-shift Polarimeter, we can prepare metastable atomic beams with a well defined energy in one Zeeman state of the hyperfine structure (hfs). In a high frequency device with k→ perpendicular to the beam axis and surrounded by a magnetic field with variable geometry and strength we can induce selected transitions in the atoms. A precise determination of the 2S1/2 (Δ f ≈ 10 Hz), 2P1/2 (Δ f ≈ 1 kHz) hfs intervall, the classical Lamb-shift (Δ f ≈ 1kHz) and relative measurements of the 2S1/2, 2P1/2 Breit-Rabi-Diagrams with the same uncertainty in both atoms will be possible. The experimental setup and first results will be presented.