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+clc;
+clear;
+del_n0=10^16 //concentration of electrons in cm^-3
+tau_n0=5 //excess carrier lifetime in s
+tau_n01=5*10^-6 //excess carrier lifetime in micro-s
+t=5 //in micro-s
+
+//Calculation
+del_nt=del_n0*exp(-t/tau_n0) //in cm^-3
+Rn1=del_nt/tau_n01
+
+mprintf("Recombination rate= %.1e cm^-3 s^-1",Rn1)