Quantitative, non-destructive elemental composition analysis of 3D-structured samples

Szentmiklósi, László; Maróti, Boglárka; Kis, Zoltán

doi:10.1039/d2ja00316c

Cited by 2 publications

(1 citation statement)

References 36 publications

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“…Fully non-destructive methods are mostly based on the use of high-energy radiation (keV) or particles (MeV) that have the advantage of not only multiple measurements and follow-up analyses but also application to samples that should remain intact, such as art-historically significant objects (archaeometry). Some examples of non-destructive or quasi-nondestructive and feasible three-dimensionally resolving methods are computed tomography (CT) [ 3 , 6 – 9 ], prompt gamma neutron activation analysis (PGAA) [ 10 ], particle-induced X-ray emission (PIXE) [ 11 , 12 ], X-ray absorption fine structure (XAFS) [ 12 – 15 ], and micro X-ray fluorescence (MXRF) spectroscopy. Most of these techniques work with spot sizes on the middle or lower micrometer scale, but could be distinguished by the different ways which are applied to generate the analytical signal (photons, ions, neutrons) and the characteristics of the resulting spectra (analyzable elements, resolution, background, sensitivity).…”

Section: Introductionmentioning

confidence: 99%

Confocal micro X-ray fluorescence analysis for the non-destructive investigation of structured and inhomogeneous samples

2023

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Confocal micro X-ray fluorescence (CMXRF) spectroscopy is a non-destructive, depth-resolved, and element-specific technique that is used to analyze the elemental composition of a sample. For this, a focused beam of mono- or polychromatic X-rays is applied to excite the atoms in the sample, causing them to emit fluorescence radiation which is detected with focusing capillary optics. The confocal design of the instrument allows for depth-resolved analysis, in most cases with a resolution in the lower micrometer dimension after collecting X-rays from a predefined volume within the sample. The element-specific nature of the technique allows information to be obtained about the presence and concentration of specific elements in this volume. This makes CMXRF spectroscopy a valuable tool for a wide range of applications, especially when samples with an inhomogeneous distribution of elements and a relatively light matrix have to be analyzed, which are typical examples in materials science, geology, and biology. The technique is also commonly used in the art and archaeology fields to analyze the elemental composition of historical artifacts and works of art, helping to provide valuable insights into their provenance, composition, and making. Recent technical developments to increase sensitivity and efforts to improve quantification in three-dimensional samples will encourage wider use of this method across a multitude of fields of application in the near future. Graphical abstract Confocal micro X-ray fluorescence (CMXRF) is based on the confocal overlap of two polycapillary lens foci, creating a depth-sensitive and non-destructive probing volume. Three-dimensional resolved element distribution images can be obtained by measuring the fluorescence intensity as function of the three-dimensional position.

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Section: Introductionmentioning

confidence: 99%

Confocal micro X-ray fluorescence analysis for the non-destructive investigation of structured and inhomogeneous samples

2023

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The redesigned neutron imaging facility, NORMA at BNC, Budapest

Kis

2024

Review of Scientific Instruments

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The Budapest Neutron Center operates the cold neutron beam imaging station, Neutron Optics and Radiography for Material Analysis (NORMA), for non-destructive testing. For the NORMA station, there have been increasing requests to reach higher spatial resolution and the ability to follow time-dependent processes. Therefore, the system used successfully so far was completely redesigned and installed for a variety of tasks. The new system is based on the principle of three independent modules, allowing for highly configurable settings. It is to find the right balance between the necessary spatial resolution, a sufficiently shorter or longer temporal resolution, and a large enough field of view. The systematic study of the setups clearly shows the parameters’ effects, helping to make the right choice for the measurement tasks. Among the rarely investigated parameters, we studied both the effect of the pixel binning and the change in the lens f-stop value on the spatial resolution. The newly improved NORMA facility allows the acquisition of high-quality neutron images for planned observations, e.g., local water kinetics in fuel cells.

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Quantitative, non-destructive elemental composition analysis of 3D-structured samples

Abstract: Prompt-gamma activation analysis (PGAA) is a non-destructive nuclear analytical method to determine the bulk elemental composition of samples with high metrological quality. We have developed an experimental procedure to collect...

Cited by 2 publications

References 36 publications

Confocal micro X-ray fluorescence analysis for the non-destructive investigation of structured and inhomogeneous samples

Confocal micro X-ray fluorescence analysis for the non-destructive investigation of structured and inhomogeneous samples

The redesigned neutron imaging facility, NORMA at BNC, Budapest

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