Espectroscopia Raman e a Ciência do Patrimônio: aspectos gerais e panorama atual na América do Sul
Resumo
As últimas décadas tem presenciado um crescente aumento no uso de métodos físico-químicos de análise de bens culturais. Algumas dessas técnicas tem se mostrado particularmente úteis pelo caráter não invasivo e não destrutivo que apresentam e, dentre elas, a espectroscopia Raman apresenta posição de destaque. Neste artigo, essas características da técnica são detalhadas, bem como são apresentados os fundamentos teóricos do espalhamento inelástico de luz e discutidos alguns aspectos práticos de sua utilização. Finalmente, é apresentado um levantamento detalhado dos grupos de pesquisa da América do Sul, voltados ao estudo de bens culturais, que tem se utilizado dessa ferramenta analítica e em qual tipo de questionamentos vem sendo aplicada.
Abstract: The last decades have witnessed an ever growing increase in the usage of physico-chemical methods to investigate cultural heritage problems. Some of these techniques are proving to be particularly useful in such a context, due to their non-invasive and non-destructive nature; among them, Raman spectroscopy occupies a prominent position. In this paper, such characteristics of the technique are detailed and the physical basis of inelastic light scattering are presented, together with some practical aspects of its applications. Finally, it is here offered a detailed survey in the literature on the South American research groups devoted to the investigation of cultural heritage issues who are using Raman spectroscopy, and the type of interrogation carried on.
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DOI: https://doi.org/10.15210/lepaarq.v15i30.14162