期刊
APPLIED RADIATION AND ISOTOPES
卷 152, 期 -, 页码 78-85出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2019.06.018
关键词
XRF scanner; Portable instrument; XRF imaging; Cultural heritage; Elemental mapping
类别
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- FAPESP [2018/12191-9]
- CNPQ [150954/2017-4]
- INCT-FNA [464898/2014-5]
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.
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