The Raman spectroscopy analysis is based on the examination of scattered light by a material when illuminated by a monochromatic beam of light. A small part of the beam is inelastically dispersed undergoing slight frequency changes that are characteristic of the analyzed material and independent of the frequency of the incident light. Raman spectroscopy is used to observe vibrational, rotational, and other low-frequency modes in a system. Commonly it is used to provide a structural fingerprint by which molecules can be identified. This is an analytical technique that can provide molecular information on organic and inorganic substances.
archaeological object and site, architecture, art, decorative arts, film, lithic industry, mosaics, painting, papyrus, rock art, sculpture, stamps, textile, anthropologic object
fossil, mineral, organic films, shell, skeleton
glass, stone, metal and metallurgical By-Products, ceramic (clay, mud brick, terracotta, earthenware, stoneware, porcelain), pigment
binding media, glues, wood, paper, textiles, varnishes
The instrument is a laboratory compact hybrid Raman-LIF-LIBS system based on the excitation of the three types of spectroscopic signals with a Q-Switched Nd:YAG laser (LS-2147, Lotis II) operating at 532, 355 or 266 nm, at a repetition rate of 10 Hz and delivering pulses of 17 ns with Gaussian-like spatial profile. The linearly polarized...