Chemistry, Ghent University, Krijgslaan 281 S12, 9000 Ghent, Belgium.
PUMA beamline, Synchrotron SOLEIL, Saint-Aubin BP48, F-91192 Gif-sur-Yvette, France.
J Synchrotron Radiat. 2019 Nov 1;26(Pt 6):2033-2039. doi: 10.1107/S160057751901230X. Epub 2019 Oct 10.
At the French synchrotron facility SOLEIL, a new X-ray imaging facility PUMA (Photons Utilisés pour les Matériaux Anciens) has been made available to scientific communities studying materials from cultural heritage. This new instrument aims to achieve 2D and 3D imaging with microscopic resolution, applying different analytical techniques including X-ray fluorescence spectroscopy (XRF), X-ray absorption spectroscopy (XAS), X-ray diffraction and phase-contrast imaging. In order to discover its capabilities a detailed analytical characterization of this beamline as an analytical and imaging tool is deemed necessary. In this work, (confocal) XRF and XAS analyses are demonstrated using the Seymchan pallasite meteorite and an Antarctic unmelted micrometeorite as case studies. The obtained spatial resolution (2 µm × 3 µm) and sensitivity (detection limits <10 p.p.m. for 1 s acquisition at 18 keV) show that PUMA is a competitive state-of-the-art beamline, providing several high-profile and high-in-demand analytical methods while maintaining applicability towards a wide range of heritage-oriented sciences.
在法国同步加速器设施 SOLEIL，一个新的 X 射线成像设施 PUMA（用于古代材料的光子）已经向研究文化遗产材料的科学界开放。这个新仪器旨在以微观分辨率实现 2D 和 3D 成像，应用包括 X 射线荧光光谱（XRF）、X 射线吸收光谱（XAS）、X 射线衍射和相衬成像在内的不同分析技术。为了发现其能力，需要对这条光束线作为分析和成像工具进行详细的分析特性描述。在这项工作中，使用 Seymchan 球粒陨石和南极未融化的微陨石作为案例研究，展示了（共焦）XRF 和 XAS 分析。获得的空间分辨率（2μm×3μm）和灵敏度（在 18keV 下 1 秒采集时检测限<10ppm）表明，PUMA 是一条具有竞争力的最先进光束线，提供了几种备受瞩目的高需求分析方法，同时保持了对广泛的面向遗产科学的适用性。
