Abstract
Radiative lifetimes of 30 excited states of Er II, rangingin energy from 25 592 to 36 148 cm−1,have been measured by means of a time-resolved laser-induced fluorescence (LIF)technique. Free, singly ionized erbium ions were produced in a laser-induced plasma. Atunable laser, with 1 ns duration pulse, was employed to selectively excite the Er+ions. The lifetime values were evaluated from the transient LIF signals recordedby a fast detection system. A comparison of the new results with previouslypublished values is given. HFR calculations, including core-polarizationcontributions, are found to be in reasonable agreement with experiment, but thepresent calculations clearly indicate that further laboratory and theoretical workis urgently needed, particularly for the low lying odd configurations of thiscomplex ion.
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