Phase radiography with neutrons

Allman, B. E.; McMahon, P. J.; Nugent, Keith A.; Paganin, David M.; Jacobson, David L.; Arif, Muhammad; Werner, S. A.

doi:10.1038/35041626

Cited by 178 publications

(90 citation statements)

References 10 publications

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“…Neutron radiographic experiments have achieved pixel widths of <15 μm, although these have important practical issues precluding their routine use at present (including prohibitively long imaging durations and/or small fields of view; Williams et al, 2012;Faenov et al, 2015). Resolution limits can be further mitigated by neutron differential phase contrast techniques; these provide sharper boundaries between materials with subtle attenuation differences (Allman et al, 2000, Pfeiffer et al, 2006, Sutton et al, 2014, such as those you might expect between organic tissues within a single specimen. These advances demonstrate that conceptual hard limits in neutron radiography have not yet been reached.…”

Section: Present Limitations and Future Directionsmentioning

confidence: 99%

Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants

Mays

Bevitt

Stilwell

2017

Palaeontologia Electronica

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Section: Present Limitations and Future Directionsmentioning

confidence: 99%

Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants

Mays

Bevitt

Stilwell

2017

Palaeontologia Electronica

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“…Both parameters (scanning time and resolution) must be greatly improved for wide and effective use of the technology, which can be achieved through the development of high-yield and compact neutron generator. Last but not least, another application of high density neutron fluxes is neutronography, 59,60 one of the most important achievements of nuclear physics over the past decades. It provides great opportunities in micro-analysis of not only physical but also chemical and biological entities.…”

Section: à2mentioning

confidence: 99%

High yield neutron generator based on a high-current gasdynamic electron cyclotron resonance ion source

Skalyga

Izotov

Golubev

et al. 2015

Journal of Applied Physics

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High yield neutron generator based on a high-current gasdynamic electron cyclotron resonance ion source Skalyga, V.; Izotov, I.; Golubev, S.; Sidorov, A.; Razin, S.; Strelkov, A.; Tarvainen, Olli; Koivisto, Hannu; Kalvas, Taneli Skalyga, V., Izotov, I., Golubev, S., Sidorov, A., Razin, S., Strelkov, A., . . . Kalvas, T. (2015). High yield neutron generator based on a high-current gasdynamic electron cyclotron resonance ion source. Journal of Applied Physics, 118 (9) In present paper, an approach for high yield compact D-D neutron generator based on a high current gasdynamic electron cyclotron resonance ion source is suggested. Results on dense pulsed deuteron beam production with current up to 500 mA and current density . It is discussed that compact neutron generator with such characteristics could be perspective for a number of applications like boron neutron capture therapy, security systems based on neutron scanning, and neutronography. V C 2015 AIP Publishing LLC. [http://dx

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“…Appropriate mathematical treatment of images can provide quantitative data on the structural topology of the material (Allman et al, 2000;Levitz, 2007). In addition, it was recently shown that projection images can also be used to derive scattering curves that are equivalent to those obtained by small-angle scattering techniques (Brisard et al, 2012;Michot et al, 2013;Bae et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Neutron imaging investigation of fossil woods: non-destructive characterization of microstructure and detection of in situ changes as occurring in museum cabinets

et al. 2017

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Abstract. This paper discusses the applicability of neutron imaging techniques for probing the internal microstructure of several fossil woods upon wetting and drying, two phenomena occurring in museum cabinets and endangering the fossil woods. Investigations were carried out using lignites (fossil woods) from two French localities (Rivecourt, Parisian Basin, Oise -Paleogene; Angeac, Aquitanian Basin, Charente -Cretaceous), which present different macroscopic behavior upon drying. Thanks to the high sensitivity of neutrons to hydrogen content, it was possible to track water diffusion through 3 mm thick samples and to follow in situ changes related to either supply or withdrawal of water without any special preparation and in a relevant time range (from 1 min to a few hours). Classical image analysis allows discriminating between the behavior of the two fossil woods with regard to their interaction with water. Further analysis based on a Fourier transform of projection images provides additional information regarding the existence of large pores in one of the samples. Differences in pore network and internal structures have important mechanical consequences as one of the samples retains its integrity upon drying, whereas the other one shatters into pieces. A better understanding of the underlying processes will clearly require multi-scale analyses, using additional techniques that could probe the materials at a lower scale. Such a combination of multi-scale analyses should provide valuable information for a better conservation of wood remnants, which is crucial for both paleobotanical research and museum exhibits.

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Phase radiography with neutrons

Cited by 178 publications

References 10 publications

Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants

Pushing the limits of neutron tomography in palaeontology: Three-dimensional modelling of in situ resin within fossil plants

High yield neutron generator based on a high-current gasdynamic electron cyclotron resonance ion source

Neutron imaging investigation of fossil woods: non-destructive characterization of microstructure and detection of in situ changes as occurring in museum cabinets

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