Qualifications & Memberships

Research Interests

Experimental and theoretical studies of gas phase electron and ion collision processes:
- the effect of molecular spatial orientation on electron impact ionization and ion-molecule collisions using crossed particle beams
- the energetics and mechanistics for electron impact ionization of small molecules and molecular clusters
- the measurement of absolute ionization cross-sections and the development of theoretical models for electron ionization processes
- the theoretical modelling of non-reactive ion-neutral collisions
- the computation of ion transport properties and the application of a drift tube to the measurement of ion mobilities.

Recent Publications

  • Bull JN., Bart M., Vallance C. and Harland PW. (2013) Electron-impact-ionization dynamics of five C2 to C4 perfluorocarbons. Physical Review A - Atomic, Molecular, and Optical Physics 88(6) http://dx.doi.org/10.1103/PhysRevA.88.062710.
  • Bull JN., Harland PW. and Vallance C. (2012) Absolute total electron impact ionization cross-sections for many-atom organic and halocarbon species. Journal of Physical Chemistry A 116(1): 767-777. http://dx.doi.org/10.1021/jp210294p.
  • Bull JN., Maclagan RGAR. and Harland PW. (2010) Comment on "On the Electron Affinity of Nitromethane (CH3NO2)". Journal of Physical Chemistry A 114(30): 8018-8019. http://dx.doi.org/10.1021/jp103773v.
  • Bull JN., Maclagan RGAR. and Harland PW. (2010) On the Electron Affinity of Nitromethane (CH3NO2). Journal of Physical Chemistry A 114(10): 3622-3629. http://dx.doi.org/10.1021/jp9113317.
  • Harland PW. and Brooks PR. (2010) Crossed-beam studies of electron transfer to oriented trichloronitromethane, CCl3NO2, molecules. Journal of Chemical Physics 132(4): 44307. http://dx.doi.org/10.1063/1.3299280.