Hydrogen Spectroscopy with a Lamb-shift Polarimeter - An Alternative Approach Towards Anti-Hydrogen Spectroscopy Experiments

摘要

A Lamb-shift polarimeter, which has been built for a fast determination ofthe polarization of protons and deuterons of an atomic-beam source and which isfrequently used in the ANKE experiment at COSY-J\"ulich, is shown to be anexcellent device for atomic-spectroscopy measurements of metastable hydrogenisotopes. It is demonstrated that magnetic and electric dipole transitions inhydrogen can be measured as a function of the external magnetic field, givingaccess to the full Breit-Rabi diagram for the $2^2S_{1/2}$ and the $2^2P_{1/2}$states. This will allow the study of hyperfine structure, $g$ factors and theclassical Lamb shift. Although the data are not yet competitive withstate-of-the-art measurements, the potential of the method is enormous,including a possible application to anti-hydrogen spectroscopy.