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+// Ex7_12 Page:141 (2014)
+clc;clear;
+E_K_alpha = 21.99; // The energy in silver for K_alpha X-ray, keV
+E_K_beta = 25.145; // The energy in silver for K_beta X-ray, keV
+EB_K = 25.514; // The binding energy of K electron in silver, keV
+E_L_alpha = E_K_beta - E_K_alpha; // The energy in silver for L_alpha X-ray, keV
+EB_L = -EB_K + E_K_alpha; // The binding energy of L electron in silver, keV
+printf("\nThe energy of the L_alpha X-ray = %5.3f keV", E_L_alpha);
+printf("\nThe binding energy of the L electron = %5.3f keV", EB_L);
+
+// Result
+// The energy of the L_alpha X-ray = 3.155 keV
+// The binding energy of the L electron = -3.524 keV \ No newline at end of file