Lestinsky M, Lindroth E, Orlov DA, Schmidt EW, Schippers S, Böhm S, Brandau C, Sprenger F, Terekhov AS, Müller A, Wolf A. Screened radiative corrections from hyperfine-split dielectronic resonances in lithiumlike scandium.
PHYSICAL REVIEW LETTERS 2008;
100:033001. [PMID:
18232975 DOI:
10.1103/physrevlett.100.033001]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2007] [Indexed: 05/25/2023]
Abstract
Term energies for dielectronic-recombination Rydberg resonances below 0.07 eV are determined for Sc18+ with absolute accuracies below 0.0002 eV by electron collision spectroscopy in an ion storage ring, using the twin-electron-beam technique and a cryogenic photocathode. The lithiumlike 2s_{1/2}-2p_{3/2} transition energy for Z=21 is determined to 4.6 ppm, less than 1% of the few-body effects on radiative corrections. Features from the hyperfine structure of the 2s state could be resolved in the dielectronic-recombination spectrum.
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