35 citations · 312 across the 17 of their papers we have counts for
17 papers
Many-body theory and Gaussian-basis implementation of positron annihilation -ray spectra on polyatomic molecules
S. K. Gregg, J. P. Cassidy, A. R. Swann +3
Doppler-broadened -ray spectra for positron annihilation on molecules are calculated using many-body theory. By employing Gaussian bases for the electron and positron wavefuncti…
Self annihilation of confined positronium
A. R. Swann, D. G. Green, G. F. Gribakin
The effect of confinement on the self-annihilation rate of positronium is studied in three levels of approximation. Artificial restriction of the electron-positron separation leads…
Positron cooling via inelastic collisions in CF and N gases
A. R. Swann, D. G. Green
Positron cooling via inelastic collisions in CF and N gases is simulated, including positron-positron interactions. Owing to the molecular symmetries, cooling is assumed to…
Many-body theory for positronium scattering and pickoff annihilation in noble-gas atoms
A. R. Swann, D. G. Green, G. F. Gribakin
The many-body-theory approach to positronium-atom interactions developed in [Phys. Rev. Lett. \textbf{120}, 183402 (2018)] is applied to the sequence of noble-gas atoms He-Xe. The…
Effect of chlorination on positron binding to hydrocarbons: experiment and theory
A. R. Swann, G. F. Gribakin, J. R. Danielson +3
Measured and calculated positron binding energies are presented for a range of hydrocarbons with up to six carbon atoms (viz., methane, acetylene, ethylene, ethane, propane, butane…
Effect of molecular constitution and conformation on positron binding and annihilation in alkanes
A. R. Swann, G. F. Gribakin
The model-potential approach previously developed by the authors to study positron interactions with molecules is used to calculate the positron binding energy for -alkanes (C$_…