Abstract
The 3p55p levels of Ar I have been excited by electron bombardment. By using the high frequency deflection technique we have measured the decay rates for 16 transitions from 9 different 5p levels. Because of favourable intensities, lifetime work at relatively high wavelength resolution (< 1 Å) was possible. Some of the 5p lifetimes obtained in this experiment tend to be significantly longer than previously reported values. Systematic trends for the 5p lifetimes are also discussed.
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