Measurements of the lifetime of the rubyR1line under high pressure

摘要

The lifetime tgr; of theR1fluorescence line,2E(Emacr;)rarr;4A2of ruby (Al2O3:Cr3+) has been measured under highhyphen;pressure conditions (up to 42.7 GPa) using a modulation fluorometry technique. This study shows that tgr; increases linearly with pressure and that this increase is primarily caused by a rapid decrease in the transition probability of the radiative transition. The present measurements agree qualitatively with the theoretically predicted decrease in the oscillator strength at high pressure.