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キーワード:
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要旨:
Spectroscopic investigations into the abundances of trans-iron elements in stars yield
valuable information about stellar evolution. In order to interpret the emission spectrum
of these stars, spectral data of trans-iron elements is required. Ruthenium
(Z=44) is particularly interesting as it has a similar atomic structure to that of
technetium (Z=43), the lightest unstable element. The half-life of technetium is
short compared to the life time of a star, allowing a time dependent insight into
stellar evolution. In this work, highly charged ruthenium ions were produced and
investigated in the Heidelberg electron beam ion trap at the Max Planck Institute
of Nuclear Physics in Heidelberg. The
uorescence light emitted by the excited
ions was recorded using a Czerny-Turner monochromator. The 53 measured optical
lines of the charge states Ru9+ to Ru18+ were compared to calculations from atomic
theory, leading to tentative identifications of 30 transitions.
