Kate Louise Nixon

Pós-doutorado

Idiomas

Participação em eventos

Produções bibliográficas

• NIXON, KATE L. ; MURRAY, ANDREW JAMES . Parametrization of Electron-Impact Ionization Cross Sections from Laser-Excited and Aligned Atoms. Physical Review Letters (Print) , v. 112, p. 023202, 2014.

• AMAMI, SADEK ; MURRAY, ANDREW ; STAUFFER, AL ; NIXON, KATE ; ARMSTRONG, GREGORY ; COLGAN, JAMES ; MADISON, DON . Theoretical and experimental study of electron-impact ionization of laser-aligned Mg atoms. Physical Review. A , v. 90, p. 062707, 2014.

• DA SILVA, G. B. ; NEVES, R. F. C. ; CHIARI, L. ; JONES, D. B. ; ALI, E. ; MADISON, D. H. ; NING, C. G. ; NIXON, K. L. ; LOPES, M. C. A. ; BRUNGER, M. J. . Triply differential (e,2e) studies of phenol. The Journal of Chemical Physics , v. 141, p. 124307, 2014.

• JHUMKA, SARAH ; NIXON, KATE L. ; HUSSEY, MARTYN ; MURRAY, ANDREW JAMES . Superelastic electron collisions with silver: Measuring the angular momentum transferred to the target during the collision. Physical Review. A , v. 87, p. 052714, 2013.

• NIXON, KATE L. ; MURRAY, ANDREW JAMES ; CHALUVADI, HARI ; NING, CHUANGANG ; COLGAN, JAMES ; MADISON, DON H. . Low energy (e,2e) coincidence studies of NH3: Results from experiment and theory. The Journal of Chemical Physics , v. 138, p. 174304, 2013.

• NIXON, KATE ; MURRAY, ANDREW . ( e ,2 e ) ionization studies of the stable noble gases in a coplanar symmetric geometry. Physical Review. A , v. 87, p. 022712, 2013.

• FUSS, M.C. ; SANZ, A.G. ; MUÑOZ, A. ; DO, T.P.D. ; NIXON, K. ; BRUNGER, M.J. ; HUBIN-FRANSKIN, M.-J. ; OLLER, J.C. ; BLANCO, F. ; GARCÍA, G. . Interaction model for electron scattering from ethylene in the energy range 1-10000eV. Chemical Physics Letters (Print) , v. 560, p. 22-28, 2013.

• NIXON, KATE L. ; MURRAY, ANDREW JAMES ; CHALUVADI, HARI ; AMAMI, SADEK ; MADISON, DON H. ; NING, CHUANGANG . Low energy (e,2e) measurements of CH4 and neon in the perpendicular plane. The Journal of Chemical Physics , v. 136, p. 094302, 2012.

• NIXON, KATE L. ; MURRAY, ANDREW JAMES . Mapping the xenon (e,2e) differential cross section from coplanar to perpendicular geometries. Physical Review. A , v. 85, p. 022716, 2012.

• DO, T. P. T. ; NIXON, K. L. ; FUSS, M. ; GARCI'A, G. ; BLANCO, F. ; BRUNGER, M. J. . Electron impact excitation of the a- 3B1u electronic state in C2H4: An experimentally benchmarked system?. The Journal of Chemical Physics , v. 136, p. 184313, 2012.

• MURRAY, ANDREW JAMES ; HUSSEY, MARTYN ; KNIGHT-PERCIVAL, ALEX ; JHUMKA, SARAH ; NIXON, KATE L ; HARVEY, MATTHEW ; AGOMUO, JOHN . Electron impact ionization and excitation studies of laser prepared atomic targets. Journal of Physics. Conference Series (Print) , v. 388, p. 012009, 2012.

• NIXON, K. L. ; MURRAY, ANDREW J. ; CHALUVADI, HARI ; NING, CHUANGANG ; MADISON, D. H. . Low energy (e,2e) studies from CH4: Results from symmetric coplanar experiments and molecular three-body distorted wave theory. The Journal of Chemical Physics , v. 134, p. 174304, 2011.

• NIXON, KATE L. ; MURRAY, ANDREW JAMES . Differential Cross Sections for Ionization of Laser-Aligned Atoms by Electron Impact. Physical Review Letters (Print) , v. 106, p. 123201, 2011.

• NIXON, KATE L ; MURRAY, ANDREW JAMES ; KAISER, CHRISTIAN . Low energy (e,2e) studies of the noble gases in the perpendicular plane. Journal of Physics. B, Atomic Molecular and Optical Physics (Print) , v. 43, p. 085202, 2010.

• NIXON, KATE L ; MURRAY, ANDREW JAMES ; AL-HAGAN, OLA ; MADISON, DON H ; NING, CHUANGANG . Low-energy symmetric coplanar and symmetric non-coplanar (e,2e) studies from the 3a state of H O. Journal of Physics. B, Atomic Molecular and Optical Physics (Print) , v. 43, p. 035201, 2010.

• AL-HAGAN, OLA ; NING, CHUANGANG ; NIXON, KATE ; MURRAY, ANDREW ; COLYER, CHRISTOPHER ; STEVENSON, MARK ; LOHMANN, BIRGIT ; MADISON, DON . Recent theoretical progress in treating electron impact ionization of molecules. Journal of Physics. Conference Series (Online) , v. 212, p. 012004, 2010.

• ZECCA, A. ; CHIARI, L. ; NIXON, K. L. ; BRUNGER, M. J. ; CHATTOPADHYAY, S. ; SANYAL, D. ; CHAKRABARTI, MAHUYA . Low-Energy Positron Scattering from Dihydropyran. The Journal of Physical Chemistry. A , v. 113, p. 14251-14254, 2009.

• MAKOCHEKANWA, CASTEN ; BANKOVIC, ANA ; TATTERSALL, WADE ; JONES, ADRIC ; CARADONNA, PETER ; SLAUGHTER, DANIEL S ; NIXON, KATE ; BRUNGER, MICHAEL J ; PETROVIC, ZORAN ; SULLIVAN, JAMES P ; BUCKMAN, STEPHEN J . Total and positronium formation cross sections for positron scattering from H O and HCOOH. New Journal of Physics , v. 11, p. 103036, 2009.

• ZECCA, ANTONIO ; CHIARI, LUCA ; SARKAR, A. ; NIXON, KATE ; BRUNGER, MICHAEL . Total cross sections for positron scattering from H_{2} at low energies. Physical Review. A , v. 80, p. 032702, 2009.

• NIXON, K.L. ; LAWRANCE, W.D. ; BRUNGER, M.J. . Electron momentum spectroscopy of formic acid. Chemical Physics Letters (Print) , v. 474, p. 23-27, 2009.

• FUSS, M ; MUÑOZ, A ; OLLER, J C ; BLANCO, F ; LIMÃO-VIEIRA, P ; HUERGA, C ; TÉLLEZ, M ; HUBIN-FRASKIN, M J ; NIXON, K ; BRUNGER, M ; GARCÍA, G . Modelling low energy electron interactions for biomedical uses of radiation. Journal of Physics. Conference Series (Online) , v. 194, p. 012028, 2009.

• ZECCA, ANTONIO ; CHIARI, LUCA ; SARKAR, A. ; LIMA, MARCO ; BETTEGA, MÁRCIO ; NIXON, KATE ; BRUNGER, MICHAEL . Positron scattering from formic acid. Physical Review. A , v. 78, p. 042707, 2008.

• ZECCA, ANTONIO ; CHIARI, LUCA ; SARKAR, A. ; NIXON, KATE ; BRUNGER, MICHAEL . Low-energy positron scattering from methanol and ethanol: Total cross sections. Physical Review. A , v. 78, p. 022703, 2008.

• NIXON, K.L. ; LAWRANCE, W.D. ; JONES, D.B. ; EURIPIDIES, P. ; SAHA, S. ; WANG, F. ; BRUNGER, M.J. . An (e,2e) coincidence study of formic acid monomer and dimer. Chemical Physics Letters (Print) , v. 451, p. 18-24, 2008.

• NIXON, K L ; LAWRANCE, W D ; BRUNGER, M J . Electron momentum spectroscopy in the study of intermolecular interactions. Journal of Physics. Conference Series (Online) , v. 141, p. 012011, 2008.

• NIXON, K. L. ; VOS, M. ; BOWLES, C. ; FORD, M. J. . Measuring the electronic structure of disordered overlayers by electron momentum spectroscopy: the Cu/Si interface. Surface and Interface Analysis (Print) , v. 38, p. 1236-1241, 2006.

• KNIPPENBERG, S. ; NIXON, K. L. ; MACKENZIE-ROSS, H. ; BRUNGER, M. J. ; WANG, F. ; DELEUZE, M. S. ; FRANÇOIS, J.-P. ; WINKLER, D. A. . Investigation into the Valence Electronic Structure of Norbornene Using Electron Momentum Spectroscopy, Green's Function, and Density Functional Theories. The Journal of Physical Chemistry. A , v. 109, p. 9324-9340, 2005.

• KNIPPENBERG, S. ; NIXON, K. L. ; BRUNGER, M. J. ; MADDERN, T. ; CAMPBELL, L. ; TROUT, N. ; WANG, F. ; NEWELL, W. R. ; DELEUZE, M. S. ; FRANCOIS, J.-P. ; WINKLER, D. A. . Norbornane: An investigation into its valence electronic structure using electron momentum spectroscopy, and density functional and Green-s function theories. The Journal of Chemical Physics , v. 121, p. 10525, 2004.

• NIXON, K L ; WANG, F ; CAMPBELL, L ; MADDERN, T ; WINKLER, D ; GLEITER, R ; LOEB, P ; WEIGOLD, E ; BRUNGER, M J . An electron momentum spectroscopy and density functional theory study of the outer valence electronic structure of stella-2,6-dione. Journal of Physics. B, Atomic Molecular and Optical Physics (Print) , v. 36, p. 3155-3171, 2003.

• MIKAJLO, E A ; NIXON, K L ; FORD, M J . Electron momentum spectroscopy and linear combination of atomic orbitals calculation of bulk Na O. Journal of Physics. Condensed Matter (Print) , v. 15, p. 2155-2168, 2003.

• MIKAJLO, E A ; NIXON, K L ; COLEMAN, V A ; FORD, M J . The electronic band structure of Li O: testing theoretical predictions using electron momentum spectroscopy. Journal of Physics. Condensed Matter (Print) , v. 14, p. 3587-3598, 2002.

• ROBERTS, E. H. ; NIXON, K. L. ; DEDMAN, C. J. ; GIBSON, S. T. ; LEWIS, B. R. . New magnetic dipole transition of the oxygen molecule: B[sup -]-[sup 3]Π[sub g]-X-[sup 3]Σ[sub g][sup −](0,0). The Journal of Chemical Physics , v. 116, p. 5503, 2002.

• NIXON, K L . Parametrization of electron-impact ionisation cross sections from laser-excited and aligned atoms. 2015. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. . Electron Impact Ionisation form Laser Aligned Magnesium. 2013. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; MURRAY, A. ; CHALUVADI, H. ; AMAMI, S. ; MADISON, D. . Measurements of (e,2e) cross sections for iso- ‐electronic atoms and molecules. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; MURRAY, A. ; MADISON, D. ; CHALUVADI, H. . Low energy (e,2e) spectroscopy. 2012. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; MURRAY, A. ; CHALUVADI, H. ; MADISON, D. . Low energy (e,2e) from noble gases, iso- electronic molecules and laser aligned atoms. 2011. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; MURRAY, A. . Electron impact ionisation of molecules. 2010. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; AL-HAGAN, O. ; NING, C. G. ; MADISON, D. ; MURRAY, A. . Low energy (e,2e) studies from CH4. 2010. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; MURRAY, A. ; KAISER, C. ; AL-HAGAN, O. ; MADISON, D. ; COLGAN, J. . (e,2e) ionisation studies of diatomic and triatomic molecules. 2009. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; BRUNGER, M. J. ; LAWRANCE, W. . Electron momentum spectroscopy in the study of intermolecular interactions. 2008. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; LAWRANCE, W. ; BRUNGER, M. J. . Intermolecular interactions probed via electron momentum spectroscopy of van der Waals molecules. 2005. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; SASHIN, V. A. ; MIKAJLO, E. A. ; BAS, B. S. ; DORSETT, H. E. ; FORD, M. J. . Band structures of the group I and II oxides: Using EMS measurements as a test for theoretical models. 2003. (Apresentação de Trabalho/Conferência ou palestra).

• NIXON, K. L. ; MACKENZIE-ROSS, H. ; FORD, M. J. ; BRUNGER, M. J. ; LAWRANCE, W. . Electron momentum spectroscopy of oriented molecules. 2000. (Apresentação de Trabalho/Conferência ou palestra).

Projetos de pesquisa

• 2014 - Atual

  Low energy electron collisions with biomass molecules, Descrição: There is an urgent need to balance the growing demand for energy with the destruction of the environment. Finding an alternative to oil based fuels has driven research in industry, non-government organizations and academia. Biomass is an attractive alternative power source to fossil fuels. Obtaining energy from biomass is achieved through the conversion of cellulose within cell walls of plants to ethanol. The ethanol produced can then be used as a fuel. Second generation bio-fuels utilize a non-food based biomass. However, economic production of second generation bio-fuels has not been achieved due to technological challenges in extracting the cellulose from biomass. New technologies to break down the lignin and hemicellulose so as to expose the cellulose are needed. The Brazilian research collaboration has proposed to use plasmas at atmospheric pressure as a method to pre-treat the biomass. In order to evaluate the feasibility of using atmospheric plasmas in cellulosic ethanol production, models of the plasmas must be developed. These models require knowledge of radical and ion production through electron collisions within the plasma and with the biomass. Therefore, accurate experimental electron collision data are necessary in understanding and controlling the plasma. Data describing the interactions of electrons with molecules similar to those found within biomass, as well as information about the ions formed by these electron interactions, will be amassed within this research collaboration.. , Situação: Em andamento; Natureza: Pesquisa. , Integrantes: Kate Louise Nixon - Coordenador / Lopes, MCA - Integrante.

• 2011 - 2013

  Ionisation of aligned atoms and molecules by low energy electron impact, Descrição: One of the major challenges in extending electron scattering models from atoms to molecules is the reduction in symmetry. In typical experiments the targets are randomly oriented and theoretical models must take this into account in order to provide results directly comparable to the experiment. Firstly, a series of iso-electronic targets was chosen, all with different symmetries, in order to assess the success of the spherical averaging method used in the theoretical models. Secondly, a new triple coincidence experiment was to be developed to detect the ion fragment resulting from the dissociation of the target. The detection position of the ion fragment indicates the alignment of the target at the time of ionization. Therefore, scattering data can be collected for known target alignments.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Kate Louise Nixon - Coordenador / MURRAY, ANDREW JAMES - Integrante., Financiador(es): European Commission - Auxílio financeiro.

• 2009 - 2011

  Fundamental studies of the ionisation of laser-aligned atoms & molecules by low energy electrons, Descrição: The dynamics of low energy electron collisions is fundamental to our understanding of many areas ranging from radiation damage induced by cancer treatments, to planetary atmospheres and energy efficient forms of lighting. (e,2e) experiments provide the most detailed information for studying the dynamics of low energy electron collisions. Two apparatus were operated in parallel. Experiments in the first apparatus recorded comprehensive data to assess the most sophisticated quantum mechanical models for noble gases. The second apparatus was used to develop a new experiment to determine the effect of target alignment on the scattering dynamics. Here magnesium atoms were excited from the 31S0 ground state to the 31P1 excited sate using a linearly polarized laser. Changing the laser polarization varied the alignment of the electron density within the magnesium atom and modifications in the experimental data was characterised. In addition to running both apparatus I managed the research budget and developed and maintained appropriate Occupational Health and Safety documentation.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Kate Louise Nixon - Coordenador / MURRAY, ANDREW JAMES - Integrante., Financiador(es): Royal Society - Auxílio financeiro.

• 2009 - 2009

  Low Energy (e,2e) from water, Descrição: Radiotherapies used in the treatment of cancers produces a cascade of lower energy secondary electrons. These secondary electrons can induce further damage to DNA, resulting in cell death outside the anticipated dose area. Research into the interactions between low energy electrons and biomolecules gives a better understanding of the effects of radiation. Water is the major component of the human body and is, therefore, an ideal starting point for these investigations. Measurements were taken over all scattering angles for a range of energies.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Kate Louise Nixon - Integrante / MURRAY, ANDREW JAMES - Coordenador., Financiador(es): British Council - Bolsa.

• 2008 - 2009

  Electron and Positron Interactions with Biomolecules, Descrição: Low energy electrons and positrons have been identified as playing an increasingly important role in biology and medicine, particularly in the areas of radiation damage and medical imaging. Low energy electrons have been shown to be responsible for DNA damage, as a secondary effect of radiotherapy treatments. A starting point for understanding these interactions is to study smaller bio-molecules. To this end, low energy electron impact excitations from ethylene (C2H4), in a crossed beam apparatus were undertaken. This project involved running the laboratory, collecting and analyzing data, collaborating with theorists and supervising a Masters student. While positron emission tomography (PET) is routinely used as a diagnostic tool in medicine, the fundamental interactions between positrons and the body remain largely unknown at the atomic and molecular level. Information of the positron annihilation rates and positronium formation cross-sections for bio-molecules are hence required. A component of this position was to visit the Australian National University (Canberra, Australia) and the University of Trento (Trento, Italy) to conduct positron scattering experiments from small biologically relevant molecules. These visits involved participating in the operation and maintenance of the apparatus, collecting positron scattering data, the analysis and interpretation of the measurements and writing up the results for publication.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Kate Louise Nixon - Integrante / BRUNGER, M J - Coordenador.

• 2001 - 2008

  Electron Momentum Spectroscopy of van der Waals Molecules and the Cu-Si Interface, Descrição: Intermolecular bonding between molecules in clusters embodies the same forces as those that hold molecules together in liquids. Investigation of the electrons involved in this bonding enhances understanding of solution chemistry. Electron momentum spectroscopy (EMS) is an ideal technique to probe the behaviour of the electrons due to the measurements relationship to the wavefunction. A novel apparatus was designed, constructed and characterised specifically for this purpose during this project. The experiment combined an EMS spectrometer with a supersonic expansion target source and a time of flight mass spectrometer (ToFMS). In addition to implementing, characterising and combining the elements of a traditional (e,2e) spectrometer in this apparatus, a new design for decelerating electron optics and the ToFMS were modeled and implemented. EMS measurements of the monomer and the hydrogen-bonded dimer forms of formic acid were made, producing the first EMS data of a system containing intermolecular interactions. Copper and silicon readily inter-diffuse to form a silicide interface several nanometers thick. This process is of interest at the fundamental level and also from a technological standpoint. Sample preparation and characterisation studies were performed to optimise the sample production. EMS measurements were taken at the Australian National University on a range of samples. The measurements were interpreted with the aid of high level ab initio calculations of a Cu7Si2 silicide and the elements copper and silicon. Initial calculations were performed on Li2O and Na2O to complement the EMS studies being performed concurrently at Flinders University, and to become familiar with the calculation methods and software.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Kate Louise Nixon - Integrante / Michael James Brunger - Coordenador / LAWRANCE, W.D. - Integrante.

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