LIBS in Cultural Heritage
Samples with archaeological or cultural value are sometimes difficult to analyze. Portable LIBS devices can be used, solving the problem when the sample cannot be moved. The LIBS technique does not require contact to analyze the sample, avoiding damage to valuable samples.
This study presents the use of a portable Laser-Induced Breakdown Spectroscopy (LIBS) prototype for determining the elemental composition of a metal jug. The system includes emission from a multipulse Q-switched Nd:YAG laser. By sampling at different points, the surface composition is determined. Furthermore, the presence of two layers of Pb and Cu and their thicknesses are determined through in-depth analysis.
Japanese jug from the twentieth century
The detailed behavior of the Cu/Pb rate and Pb relative intensity.
History of the elemental composition of the jar as a function of depth: Ca (II) (393.36 nm), Pb (I) (405.78 nm), Cu (I) (521.82 nm), Si (II) (546.68 nm), Na (I) (588.99 nm) and K (I) (766.48 nm).