Soft-x-ray spectra of highly charged Kr ions in an electron beam ion trap.
Systematic variation of the electron-beam energy in the EBIT-II electron beam ion trap has been employed to produce soft-x-ray spectra (20-75 A) of Kr with well-defined maximum charge states ranging from Cu- to Al-like ions. Guided by large-scale relativistic atomic structure calculations, the strongest lines have been identified with Delta n=1 (n=3 to n(')=4) transitions from Ni- to P-like ions (Kr(8+)-Kr(21+)), as well as a number of 3p-4d and 3d-5f transitions.
Chen
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Department of Physics and Advanced Technologies, Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
Beiersdorfer
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P
Fournier
K B
KB
Träbert
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E