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+//Chapter 9, Example 9.1, Page 241
+clc
+clear
+// Iron kerma and absorbed dose rates
+Sp = 10**14
+r = 100
+mew = 0.03031
+mtr = 0.02112 // mew/pro
+men = 0.01983 // mew/pro
+p0 = 10**-6*Sp*exp(-mew*r)/(4*%pi*r**2)
+K0 = 1.602*10**-10*mtr*p0
+D0 = 1.602*10**-10*men*p0
+printf("p0 = %f cm^-2s^-1\n",p0)
+printf(" K0 = %e Gy/s\n",K0)
+printf(" D0 = %e Gy/s\n",D0)
+// Answers may vary due to round off error