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Two-photon laser spectroscopy of the muonium 1S–2S transition |
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| Authors: | K Jungmann P E G Baird J R M Barr C Bressler P F Curley R Dixson G H Eaton A I Ferguson H Geerds V W Hughes J Kenntner S N Lea F Maas M A Persaud G zu Putlitz P G H Sandars W Schwarz W T Toner M Towrie G Woodman L Zhang Z Zhang |
| Institution: | 1. Physikalisches Institut, Universit?t Heidelberg, Philosophenweg 12, W-6900, Heidelberg, Federal Republic of Germany 2. Department of Physics, University of Oxford, OX1 3PU, Oxford, United Kingdom 3. Department of Physics, University of Southampton, S09 5NH, Southampton, United Kingdom 4. Department of Physics and Applied Physics, University of Strathclyde, G4 ONG, Glasgow, United Kingdom 5. Gibbs Laboratory, Physics Department, Yale University, 06511, New Haven, CT, USA 6. Rutherford Appleton Laboratory, OX11 0QX, Chilton Didcot Oxon, United Kingdom |
| Abstract: | The 12 S 1/2(F=1)?22 S 1/2(F=1) energy interval in muonium has been investigated by Doppler-free two-photon laser spectroscopy. The transition was observed by uniquely identifying and counting the muons released after the photoionization of the 2S state by the same laser field. The measured transition frequency of 2455 528016(58)(43) MHz is in good agreement with QED calculations. The experiment can be interpreted as a test of the Lamb shift contributions at the 1% level. The method is also well suited for a precise determination of the mass of the positive muon in a muoniumhydrogen isotope shift measurement. |
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