Informace o publikaci

Influence of laser wavelength and laser energy on depth profiling of easel painting samples

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POSPÍŠILOVÁ Eva NOVOTNÝ Karel POŘÍZKA Pavel HRADILOVÁ Janka KAISER Jozef KANICKÝ Viktor

Rok publikování 2019
Druh Článek v odborném periodiku
Časopis / Zdroj Chemical Papers
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://link.springer.com/article/10.1007%2Fs11696-019-00803-z
Doi http://dx.doi.org/10.1007/s11696-019-00803-z
Klíčová slova LIBS; Ablation craters; Fluorine detection
Popis The depth-resolved analysis by means of the laser-induced breakdown spectroscopy (LIBS) is a useful tool in the investigation of multi-layered structures of paintings. The LIBS technique is considered micro-destructive, as it is associated with the formation of the ablation crater. It is important to optimize the laser pulse parameters to minimize the crater size and also to avoid some possible side effects of the laser radiation, such as the material redeposition and the light- or heat-induced pigment discoloration. In the present work, mock-up painting samples were used to investigate the influence of laser radiation characteristics on the ablation process. The first LIBS set-up contains a Nd:YAG laser at the second harmonic frequency (laser wavelength 532 nm, pulse duration ~ 10 ns) and the second set-up is comprised of a modified laser-ablation system equipped with a Nd:YAG laser at the fourth harmonic frequency (laser wavelength 266 nm, pulse duration ~ 5 ns). The influence of different laser wavelengths and different laser energies on the properties of the craters was examined. The effects caused by the laser-ablation process were described.
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