Probing Electron Dynamics in the Molecular Frame. The outcome of this project will be an improved understanding of the molecular fragmentation process, enhancing our ability to control chemical reactions through a better knowledge of the mechanisms which drive them. By providing data which will stimulate the development of theory it will encourage creativity and innovation. Results will contribute to building a strong foundation in the fundamental physical sciences and lead to advances in area ....Probing Electron Dynamics in the Molecular Frame. The outcome of this project will be an improved understanding of the molecular fragmentation process, enhancing our ability to control chemical reactions through a better knowledge of the mechanisms which drive them. By providing data which will stimulate the development of theory it will encourage creativity and innovation. Results will contribute to building a strong foundation in the fundamental physical sciences and lead to advances in areas ranging from quantum chemistry, the chemistry of planetary atmospheres to mechanisms responsible for radiation damage in biological systems.Read moreRead less
Environmental and Technological Applications of Electron-Driven Processes. We plan to use state-of-the-art experimental techniques and methodologies for the measurement of collision cross sections and reaction rates for low energy electron-driven process in molecules and molecular radicals. These processes are fundamental to our understanding of our environment and many devices used in the technology of today and of the future. In particular we will provide accurate cross sections for NOx and SO ....Environmental and Technological Applications of Electron-Driven Processes. We plan to use state-of-the-art experimental techniques and methodologies for the measurement of collision cross sections and reaction rates for low energy electron-driven process in molecules and molecular radicals. These processes are fundamental to our understanding of our environment and many devices used in the technology of today and of the future. In particular we will provide accurate cross sections for NOx and SOx pollutants and H2O, as well for molecules such as C4F8, and its radicals such as CF2, which are used extensively in plasma processing technologies.Read moreRead less
Quantum Entanglement of Protons Studied by Electron Scattering at High Momentum Transfer. Eighty years after the establishment of quantum mechanics protons in matter are still largely seen as 'classical' particles, that do not interfere in ways known to occur for light and electrons. There are indications from neutron and electron scattering experiments from solids that, for extremely short time scales, (one-millionth of a nanosecond), this picture is too simple. The proposed experiment seeks t ....Quantum Entanglement of Protons Studied by Electron Scattering at High Momentum Transfer. Eighty years after the establishment of quantum mechanics protons in matter are still largely seen as 'classical' particles, that do not interfere in ways known to occur for light and electrons. There are indications from neutron and electron scattering experiments from solids that, for extremely short time scales, (one-millionth of a nanosecond), this picture is too simple. The proposed experiment seeks to establish this fact for molecules in the gas-phase. As the chemical bond is formed at similar time-scales these experiments will improve our understanding of chemical reactions, and hence be of great value for the chemical industry.Read moreRead less
Collision Studies with Laser-Cooled Metastable Helium Atoms - Recoil Atom Spectroscopy. This project will provide the first absolute, differential measurements of the scattering of low energy electrons from metastable excited helium atoms. Laser-cooling techniques are used to create a bright, slow helium beam and a unique approach, where the recoiling atoms are detected, is used for the scattering measurements. Such measurements are of critical importance in the assessment of new scattering th ....Collision Studies with Laser-Cooled Metastable Helium Atoms - Recoil Atom Spectroscopy. This project will provide the first absolute, differential measurements of the scattering of low energy electrons from metastable excited helium atoms. Laser-cooling techniques are used to create a bright, slow helium beam and a unique approach, where the recoiling atoms are detected, is used for the scattering measurements. Such measurements are of critical importance in the assessment of new scattering theories for excited states and in understanding the role which excited species play in the behaviour of low temperature gas discharges and thus also on the operation of many important devices and phenomena which are based on discharge technology.Read moreRead less
Ionization and excitation of excited helium atoms. Our ability to improve the performance and reliability of electronic devices based around discharge technology relies upon our ability to model and quantify the energy-exchange processes which drive them. Our research will highlight the nature of highly-excited helium atoms and the way they interact with their environment. The purpose of our work is twofold; firstly to provide stringent tests to theory to enhance our understanding of mechanisms ....Ionization and excitation of excited helium atoms. Our ability to improve the performance and reliability of electronic devices based around discharge technology relies upon our ability to model and quantify the energy-exchange processes which drive them. Our research will highlight the nature of highly-excited helium atoms and the way they interact with their environment. The purpose of our work is twofold; firstly to provide stringent tests to theory to enhance our understanding of mechanisms driving discharge-based devices and secondly, to provide benchmark reaction rates which can be used in the modeling of discharge-based devices to improve their performance.Read moreRead less
Dynamic Correlations and Coherence Effects in Two-Electron Emission Processes. The electronic structure and properties of matter are determined by the correlated motion of electrons. Thus an understanding of this quantum mechanical many-body problem is central to our understanding of nature. We will apply laser-based quantum-state-selective techniques and advanced instrumentation to uncover new phenomena in many-body spin-correlated electron dynamics, quantum coherence and entanglement. The resu ....Dynamic Correlations and Coherence Effects in Two-Electron Emission Processes. The electronic structure and properties of matter are determined by the correlated motion of electrons. Thus an understanding of this quantum mechanical many-body problem is central to our understanding of nature. We will apply laser-based quantum-state-selective techniques and advanced instrumentation to uncover new phenomena in many-body spin-correlated electron dynamics, quantum coherence and entanglement. The resulting benchmark data will force significant developments in theory, extending its predictive power to drive advancements in areas ranging from industrial and astrophysical plasmas, gas discharges, lasers, and planetary atmospheres, to nanoscale electronic and spintronic devices.Read moreRead less
Advanced Atomic Sources for Precision Measurement. Many advances in our technology-driven society rely on the precision measurement of quantities such as accelerations, magnetic and electric fields. A higher level of measurement precision leads to a clear economic or strategic advantage. We expect to provide the Australian industrial and government sectors with new and better methods for making precise measurements with accelerometers, gyroscopes and gravity gradiometers. This proposal will pla ....Advanced Atomic Sources for Precision Measurement. Many advances in our technology-driven society rely on the precision measurement of quantities such as accelerations, magnetic and electric fields. A higher level of measurement precision leads to a clear economic or strategic advantage. We expect to provide the Australian industrial and government sectors with new and better methods for making precise measurements with accelerometers, gyroscopes and gravity gradiometers. This proposal will place Australia with only a handful of other countries as an international leader in the new technology of coherent atom interferometry. It is expected that this proposal will lead to innovative prototype devices as well as significant patentable technology. Read moreRead less
Alpha-particle cluster structure in light nuclei: helping and hindering fusion? A new, efficient detector system will be designed and built to answer a question never before asked - can the special structures of carbon, resembling three alpha-particles, assist rather than hinder the process of fusion with heavy nuclei? This question has arisen through my recent work published in Nature, which showed that in reactions with heavy nuclei, paradoxically both fusion and break-up into alpha-particles ....Alpha-particle cluster structure in light nuclei: helping and hindering fusion? A new, efficient detector system will be designed and built to answer a question never before asked - can the special structures of carbon, resembling three alpha-particles, assist rather than hinder the process of fusion with heavy nuclei? This question has arisen through my recent work published in Nature, which showed that in reactions with heavy nuclei, paradoxically both fusion and break-up into alpha-particles are more likely for carbon than for neighbouring nuclei. These results defy interpretation within the standard theory of nuclear fusion. The project will help to maintain Australia's world-leading position in the study of nuclear fusion.
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Reaching the superheavy elements: a new approach with a novel ultra-sensitive detector array. Our project aims to build the knowledge base underpinning the creation of new heavy elements and isotopes. This first direct investigation of the hoped-for benefits of using radioactive beams will enhance the strong reputation of Australian research in the fundamental subject of nuclear fusion. The unique and sophisticated scientific instrument to be developed will enhance the capability of our RIEF-fun ....Reaching the superheavy elements: a new approach with a novel ultra-sensitive detector array. Our project aims to build the knowledge base underpinning the creation of new heavy elements and isotopes. This first direct investigation of the hoped-for benefits of using radioactive beams will enhance the strong reputation of Australian research in the fundamental subject of nuclear fusion. The unique and sophisticated scientific instrument to be developed will enhance the capability of our RIEF-funded fusion product separator at the ANU, and use at overseas radioactive beam accelerators will showcase Australian technological achievement. This early participation in exciting, leading-edge developments will help Australian researchers to make full use of future, intense radioactive beam facilities, both in pure and applied research. Read moreRead less
Developing and exploiting a beam of exotic neutron halo nuclei: probing quantum coherence and decoherence at the femtoscale. Developing an Australian rare isotope beam capability with unique features will be a breakthrough in Australia's capability in science. It will create new opportunities for local research with radioactive isotope beams, a field being vigorously developed world-wide, as new access to short-lived radioactive isotopes will open up many opportunities in fundamental research an ....Developing and exploiting a beam of exotic neutron halo nuclei: probing quantum coherence and decoherence at the femtoscale. Developing an Australian rare isotope beam capability with unique features will be a breakthrough in Australia's capability in science. It will create new opportunities for local research with radioactive isotope beams, a field being vigorously developed world-wide, as new access to short-lived radioactive isotopes will open up many opportunities in fundamental research and applications. The experience and strong international linkages from this project will facilitate the longer-term use of future large-scale international facilities. This project will also build links with other areas of research strength in Australia, and keep us at the cutting-edge in research and training in nuclear science, a matter of national importance.Read moreRead less