(二) 計算題： 1. For a simplified Jablonski Diagram as shown below kr : rate constant for radiative deactivation S1 S0 with emission of fluorescence. kic: rate constant for internal conversion S1 S0. kisc: rate constant for intersystem crossing. Assume that kr, kic, and kisc of a molecule are 108 , 5 108 , and 4 108 s-1, respectively. (A) What is the lifetime of the S1 state of that molecule(2%)?