Picosecond Laserphotolysis on Photo-Induced Defect Formation Process in KI Crystal

摘要: The relaxation process to the self-trapped excitons (STE) at lowest triplet state (STE L ) and formation of [ F + H ] center pairs have been investigated by picosecond laser photolysis nanosecond electron-beam radiolysis between 80 K 296 K. Below ∼95 K, main products are STE . Then, time is 20±10 ps. Between ∼140 mainly produced, centers slightly produced simultaneously. grow also with a slow corresponding lifetime τ T d typical 95±10 ns 128 Above still However, initial yield for reduced, while that increase, increasing temperature. Possible branching pathways from higher excited states into pair discussed.