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Instruments / Technical Area	Publication Details	Published	Actions
I13-1-Coherence I18-Microfocus Spectroscopy	Provenance of uranium particulate contained within Fukushima Daiichi Nuclear Power Plant Unit 1 ejecta material Peter G. Martin , Marion Louvel , Silvia Cipiccia , Christopher P. Jones , Darren J. Batey , Keith R. Hallam , Ian A. X. Yang , Yukihiko Satou , Christoph Rau , J. Fred W. Mosselmans , David Richards , Thomas B. Scott Nature Communications 10, 2801 DOI: 10.1038/s41467-019-10937-z Diamond Proposal Number(s): [16701, 16702, 18186] Open Access Show Abstract ▼ Abstract: Here we report the results of multiple analytical techniques on sub-mm particulate material derived from Unit 1 of the Fukushima Daiichi Nuclear Power Plant to provide a better understanding of the events that occurred and the environmental legacy. Through combined x-ray fluorescence and absorption contrast micro-focused x-ray tomography, entrapped U particulate are observed to exist around the exterior circumference of the highly porous Si-based particle. Further synchrotron radiation analysis of a number of these entrapped particles shows them to exist as UO2—identical to reactor fuel, with confirmation of their nuclear origin shown via mass spectrometry analysis. While unlikely to represent an environmental or health hazard, such assertions would likely change should break-up of the Si-containing bulk particle occur. However, more important to the long-term decommissioning of the reactors at the FDNPP (and environmental clean-upon), is the knowledge that core integrity of reactor Unit 1 was compromised with nuclear material existing outside of the reactors primary containment.	Jun 2019
I22-Small angle scattering & Diffraction	Nuclear magnetic resonance and small-angle X-ray scattering studies of mixed sodium dodecyl sulfate and N,N-dimethyldodecylamine N-oxide aqueous systems performed at low temperatures Emily Summerton , Martin J. Hollamby , Cécile S. Le Duff , Emma S. Thompson , Tim Snow , Andrew Smith , Christopher Jones , Jeanluc Bettiol , Serafim Bakalis , Melanie M. Britton Journal Of Colloid And Interface Science DOI: 10.1016/j.jcis.2018.09.053 Diamond Proposal Number(s): [16560] Show Abstract ▼ Abstract: Surfactant crystallisation is important in many applications in the food, consumer product and medical sectors. However, these processes are not well understood. In particular, surfactant crystallisation can be detrimental to the stability of detergent formulations, such as dish liquid products, resulting in a turbid solution that fails appearance criteria. With the rising global demand for detergent products, understanding the factors that influence formulation stability is of increasing importance. To enable industry to build more robust formulations, it is important to understand the underlying chemistry of the crystallisation process. Here, a model system containing anionic (sodium dodecyl sulfate, SDS) and amphoteric (N,N-dimethyldodecylamine N-oxide, DDAO) surfactants, at concentrations typical of dish liquid products, is studied. Variable temperature 1H nuclear magnetic resonance (NMR) spectroscopy and small-angle X-ray scattering (SAXS) is used to probe the compositional and structural properties of this system, as a function of pH. On cooling, at pH 9, a mixture of hydrated crystals, predominately composed of SDS, and micelles containing both surfactants, have been observed prior to complete freezing. At pH 2, both surfactants appear to undergo a simultaneous phase transition, resulting in the removal of micelles and the formation of hydrated crystals of mixed composition.	Sep 2018

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