Abstract

Electron impact excitation has been used to study high-lying states of mercury that exist in the energy range 8.4 to 12.2 eV. Excitation of several 5d106snl and 5d96s2(2D52,3/2/)6p states has been observed. The decay of negative-ion resonances to the states lying below the Hg+(2S12/) ionisation potential has been studied. More information regarding the recently discovered higher-lying metastable state has been obtained and its lifetime has been measured to be 380+or-90 mu s. Above the Hg+(2S12/) ionisation potential the effects of post-collision interaction in the decay of 5d96s2(2D32/)6p autoionising states have been studied.

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