3. G. MONDIO
Information acquired: 2025
G. MONDIO is an academic who published a paper in 2015 entitled Laser ablation coupled to mass quadruple spectometry (LAMQS) applied to ancient coins. G. MONDIO published this work as part of a team: Torrisi, L.. Here is a description of this work: A N,,:Yag laser operating in second harmonic (532 nm), 3 ns pulse duration, 1-150 mJ pulse energy and 1-10 Hz repetition rate is employed to irradiate different coins placed in high vacuum chamber. The ablated material, in vapor phase, is analyzed by a mass quadrupole spectrome-ter in the range 1-300 amu with sensitivity up to 1 ppm. The â€oeon line†analysis permits to investigate on the ele-ments, chemical compounds and isotopic ratios character-izing the coin composition. Focused and unfocused laser beams can be employed to irradiate sub-millimetric or tens millimetric areas, respec-tively. The first method is employed to determine the ele-mental depth profiles from surface up to about 0. 1 mm. The second method is employed to analyze the average composition of the superficial patina layers. This micro-invasive technique, associated to the characteri.