DEPTH RESOLVED ION-BEAM ANALYSIS OF OBJECTS OF ART

The external proton beam progressively gains more attention, particula rly in connection with recent new possibilities combining non-vacuum P IXE and RES. To identify paint layer arrangements and their elemental composition external PIXE was applied varying the incident proton ener gy. This technique is checked on a set of test paint layers combining pigments typically applied in the Middle Ages as well as presently. Th in surface paint has been successfully characterized by means of simul taneous external RES complementary to PIXE, Presented as an example ar e depth resolved measurements on a red colored detail of the painting ''14 Nothelfer'' from Lucas Cranach the Elder.