- 作者: Nobuyuki Nakamuraa, Daiji Katoa, Tetsuro Nakaharab and Shunsuke Ohtania,b
- 中文摘要:
aCold Trapped Ions Project, ICORP, JST, 1-40-2 Fuda, Chofu, Tokyo 182-0024, Japan
bThe University of Electro-Communications, Chofu, 182-8585 Tokyo, Japan
Recent results and experimental plans in X-ray spectroscopic studies of highly charged ions at the Tokyo EBIT (Electron Beam Ion Trap) are presented. We have been using a flat crystal spectrometer to observe X-ray transitions in the energy range of 3-10 keV. It has been used to investigate the strong configuration mixing in neonlike ions, the electron-impact excitation of highly charged ions, the polarization of Ly-a in hydrogenlike Ti21+, and so on. A Johansson type of spectrometer has been constructed to observe X-ray transitions in the higher energy range, 10-30 keV. It will be used for high-resolution spectroscopy of the Lyman series in hydrogenlike medium-Z ions. In particular, an intercomparison method between Ly-a of In48+ and Ly-b of Rh44+ is proposed to measure the 1s Lamb shift precisely. It will provide a precise test of the QED theory in the strong field regime. - 英文摘要: --
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