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[5015] Artykuł: High-accuracy crystal spectroscopy of the n=2 energy level of helium-like uraniumCzasopismo: Canadian Journal of Physics Tom: 85, Zeszyt: 5, Strony: 441-451ISSN: 0008-4204 Wydawca: CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS, 1200 MONTREAL ROAD, BUILDING M-55, OTTAWA, ON K1A 0R6, CANADA Opublikowano: Maj 2007 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 15 Klasyfikacja Web of Science: Article; Proceedings Paper ![]() ![]() |
We present a new experiment for the accurate study of the intrashell transition 1s2p (3)p(2)-> 1s2S (3)S(1) in helium-like uranium near 4.5 keV using a Johann-type Bragg spectrometer with a spherically bent crystal. The focusing property of the bent crystal enhances the spectrometer's efficiency compared to flat crystal spectrometers and it will enable us, for the first time, to evaluate, accurately, the Lamb shift for n = 2 states in highly charged helium-like ions. The data will be acquired at the storage ring ESR of GSI using a fast H-like uranium beam colliding with a gas target. This measurement will provide the most sensitive test for the relativistic electron-electron interaction in a strong Coulomb field.