Rapid qualitative determination of main components in archeological samples by radioisotope-excited X-ray fluorescence analysis

Archeological specimen were examined by the radioisotope-excited X-ray method to determine their chemical composition. Individual K and L X-rays of Fe, Ni, Cu, Zn, Pb, Mo, Ag, In, Sn and Ba were induced by using 241Am - I and 241Am- Tm source- target assemblies. A lithium drifted silicone diode coupled to a 400-channel analyzer was used for detection. No sample preparation was required and all the elements were measured simultaneously in 40 min counting time. The use of different targets coupled with only one primary source makes this technique simple, versatile and economical. The target materials are suitable for exciting K and L X-rayd from potassium to uranium. In addition, the targets, as monoenergetic secondary sources, minimize the background effect. (T.G.)