A5038716617- Atomic and Molecular Physics
- Muon and positron interactions and applications
- Graphene research and applications
- Advanced DC-DC Converters
- X-ray Spectroscopy and Fluorescence Analysis
- Engineering and Technology Innovations
- Electron and X-Ray Spectroscopy Techniques
- Electric Motor Design and Analysis
- Particle accelerators and beam dynamics
- Sensorless Control of Electric Motors
- Innovative Energy Harvesting Technologies
- Induction Heating and Inverter Technology
- Power Quality and Harmonics
- Quantum and Classical Electrodynamics
Australian National University
2020-2024
Curtin University Sarawak
2008-2009
Scattering resonances are relatively rare in positron scattering, with the only observed instances to date being vibrational Feschbach resonances, through their effect on annihilation cross section. In this study, we present observations of excitation by impact ethane, ethylene, and acetylene, explore dynamics resonance formation decay. There far fewer spectra than channel. Due difficulties inherent measuring relevant scattering processes at low energies required observe decay modes these...
The present paper provides a joint experimental and theoretical study of positron scattering from pyrazine. Experimental data were measured employing low-energy beamline, covered an energy range 1 to 79 eV. Cross sections for total scattering, elastic positronium formation, direct ionization, the sum discrete electronic-state excitation processes. In addition, electronic cross individual ${1}^{1}{B}_{3u},$ ${1}^{1}{B}_{2u},$ ${1}^{1}{B}_{1u},$ ${2}^{1}{B}_{2u}$ states are also reported....
Abstract This paper presents a detailed study of low energy positron scattering from formic acid, examining elastic scattering, electronic excitation and ionisation processes. Through comparisons with previous experimental theoretical data, it is clear that the picture for this target remains incomplete, significant disagreement between experiment theory in differential cross section data. Calculations electron are unexpectedly better agreement experiments, give some hints as to potential...
This paper presents measurements of scattering positrons from ethane. Grand total, total elastic, positronium formation, ionization, and angular differential elastic-scattering cross sections have been observed are shown along with comparisons to previous experimental theoretical values. There a number discrepancies data some discussion these possible explanations presented. wider range provides more comprehensive picture positron this target then allows us suggest pathways resolution the...
This paper presents a joint experimental and theoretical study of positron scattering from furan. Experimental data were measured using the low energy beamline located at Australian National University cover an range 1 eV to 30 eV. Cross sections for total scattering, elastic inelastic positronium formation, differential scattering. Two approaches are presented: Schwinger multichannel method independent atom with screening corrected additivity rule. In addition, our compared corresponding...
Abstract We report measurements of low energy positron scattering from neon, with the first absolute differential cross sections (DCSs) and state-selective electronic excitation. These are compared to calculations using relativistic optical potential (ROP) technique, as well other recently published theoretical calculations. At lowest energies, experimental DCS data fitted extract phase shifts, which can be values also used generate over full angular range. For most part we find good accord...
There are many pump and motor installations with quite extensive speed variation, such as Sago conveyor, heating, ventilation air conditioning (HVAC) water pumping system. A common solution for these applications is to run several fixed motors in parallel, flow control accomplish by turning the on off. This type of method causes high in‐rush current, adds a risk damage caused pressure transients. paper explains design implementation temperature system use industrial commercial sectors....
Energy saving issue is a matter of great concern for industry and electrical utilities. from fluorescent lamp system can be achieved by means optimizing lighting level, reducing power consumption improving the efficiency lamps. This paper presents an alternative energy control method electromagnetic ballast Non‐linearity characteristics lamps effect controller are taken into account in proposed controller. The provides feature dimmable illuminance level In comparison to electronic ballast,...
Synopsis Data will be presented for positron scattering from neon. As a “simple” target, neon provides useful target the testing and exploration of our fundamental understanding processes. The low-energy, high-resolution beamline based at Australian National Universitywas used to measure elastic differential cross sections total electronic ionization low energy positrons experimental data compared several recent theoretical calculations.