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Evironmental physics research

There are several areas of Environmental Physics Research at RSPhysSE.

Accelerator Mass Spectrometry is a highly sensitive technique for identifying and quantifying minute traces of isotopes. At RSPhysSE we have adapted this technique to study the propagation of plutonium in the environment following accidents and past bad practice at various nuclear plants around the world. The advantage of AMS is that it is able to determine isotope ratios in samples with extremely small concentrations of plutonium. By knowing the isotope ratios it is possible to identify not only the nuclear plant responsible for contaminations but also in many cases how radioactive release into the environment took place. This is important both for policing and also in recommendation of the most appropriate strategy for clean up.

Atmospheric Physics. In order to properly understand the processes related to ozone formation and depletion, it is necessary have a good understanding of how ultraviolet light interacts with oxygen molecules. Atmospheric physics research at RSPhysSE focuses on the development and application of widely tuneable coherent sources of vacuum ultraviolet light and their application to the study of photo-dissociation dynamics. There are also close analogies between magnetically confined plasmas and planetary atmospheres, where the Coriolis force plays the role of the magnetic field. The Energetically Open Systems Group is engaged in a formal collaboration with CSIRO Atmospheric Research to further increase our understanding of the complex dynamics of both turbulent plasmas and atmospheres.

Selected research highlights

Selected available student research projects

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Experiments with rotating fluids aim at better understanding of fundamental processes which determine the dynamics of planetary atmospheres and oceans. The presence of the Coriolis force leads to quasi-two-dimensional behaviour of the 3D flows making such a flow similar to magnetized plasma.
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Accelerator Mass Spectrometry Measurements of the fallout plutonium concentration in stream sediments feeding the Cotter River. The data will elucidate which soil erosion mechanisms dominate in the various sub-catchments that feed the Cotter Dam.
Crude oil in salt water displays a striking ability to form emulsion droplets of very high stability by addition of nanoparticles which line the oil-water interface. Emulsion stability as a function of type of particle and salt concentrations will be studied, with applications to improving recovery of oil from reservoirs and spills.

Updated:  18 July 2011/Responsible Officer:  Director, RSPE /Page Contact:  Physics Webmaster