A low-cost portable system for elemental mapping by XRF aiming in situ analyses

Autor(es)

Campos, P. H. O. V. ^{[1, 2]} ; Appoloni, C. R. ^[2] ; Rizzutto, M. A. ^[1] ; Leite, A. R. ^[1] ; Assis, R. F. ^[1] ; Santos, H. C. ^[1] ; Silva, T. F. ^[1] ; Rodrigues, C. L. ^[1] ; Tabacniks, M. H. ^[1] ; Added, N. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, Rua Matao, Trav R 187, BR-05508090 Sao Paulo - Brazil

^[2] Univ Estadual Londrina, Ctr Ciencias Exatas, Dept Fis, Londrina - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Radiation and Isotopes; v. 152, p. 78-85, OCT 2019.
• Citações Web of Science: 0

Resumo

This work presents the development of a portable system that allows 2D elemental mapping of large areas (maximum of 35.0 x 35.0 cm(2)) by XRF. A measuring head, composed of an x-ray source and a detector, is mounted on a 3-axis stage with movement reproducibility better that 0.03 mm. The final elemental map resolution of 1.4 mm was experimentally determined in the best condition of collimation, and the same experiments indicate that the resolution is fully dominated by the x-ray beam spot size. The main goal of this new setup is to perform analyses of historical, archaeological and geological objects. Because it's lightweight, our setup has the potential to be of great utility for in situ analyses, given the great difficulty and high costs transporting the artifacts from the museum to a laboratory. The importance of this instrumentation is related to the need to identify the distribution of the chemical elements in large surface areas of cultural heritage objects by a non-destructive method. (AU)

• Processo FAPESP: 18/12191-9 - Estudo e caracterização elementar por fluorescência de Raios-X, espectroscopia Raman e imagens de algumas obras do salão nobre "Independência ou Morte"
• Beneficiário: Pedro Herzilio Ottoni Viviani de Campos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado