Journal Article

PreJuSER-10834

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Hydrogen spectroscopy with a Lamb-shift polarimeter

Westig, M. P. ; Engels, R.FZJ* ; Grigoryev, K. ; Mikirtychyants, M. ; Rathmann, F.FZJ* ; Paetz gen. Schieck, H. ; Schug, G.FZJ* ; Vasilyev, A. ; Ströher, H.FZJ*

2010
Springer Berlin

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Please use a persistent id in citations: http://hdl.handle.net/2128/10287  doi:10.1140/epjd/e2010-00016-9

Abstract: A Lamb-shift polarimeter, which has been built for a fast determination of the polarization of protons and deuterons of an atomic-beam source and which is frequently used in the ANKE experiment at COSY-Julich, is shown to be an excellent device for atomic-spectroscopy measurements of metastable hydrogen isotopes. It is demonstrated that magnetic and electric dipole transitions in hydrogen can be measured as a function of the external magnetic field, giving access to the full Breit-Rabi diagram for the 2(2)S(1/2) and the 2(2)P(1/2) states. This will allow the study of hyperfine structure, g factors and the classical Lamb shift. Although the data are not yet competitive with state-of-the-art measurements, the potential of the method is enormous, including a possible application to anti-hydrogen spectroscopy.

Keyword(s): beam: polarization ; dipole: transition ; dipole: electric ; p: polarization ; magnetic field: external field ; Lamb shift ; antihydrogen ; hyperfine structure ; ANKE ; atom: beam ; beam: energy ; Juelich COSY PS ; dipole: magnetic ; hydrogen: atom ; photomultiplier

Note: We are grateful for discussions with Th. Udem, D. L. Moskovkin and D. A. Glazov. We thank other members of IKP-2 of Forschungszentrum Julich for their help during the measurements and C. Wilkin for carefully reading the manuscript. The support from JCHP-FFE of the Forschungszentrum Julich is gratefully acknowledged.

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Contributing Institute(s):

1. Experimentelle Hadrondynamik (IKP-2)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2010

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