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+// Chapter 3_The Semiconductor in Equilibrium
+//Caption_Statistics of acceptors and donors
+//Ex_8//page 110
+Na=10^16   //Acceptor concentration
+kT=0.0259
+Nv=1.04*(10^19); 
+Eav=0.045
+x=0.1   //90%of acceptor atoms are ionized
+y=(((1/x)-1)*4*Na/Nv);
+//(T/300)^1.5*exp(-Eav/kT*(T/300))=y
+//By trial and error
+printf('Required temperature is 193 K')
+\ No newline at end of file