https://doi.org/10.1140/epjd/e2008-00188-9
Positron annihilation in large polyatomic molecules. The role of vibrational Feshbach resonances and binding
Department of Applied Mathematics and Theoretical Physics, Queen's University, Belfast BT7 1NN, Northern Ireland, UK
Corresponding author: a g.gribakin@qub.ac.uk
Received:
25
March
2008
Revised:
8
June
2008
Published online:
3
October
2008
We analyse the process of rapid positron annihilation in large polyatomic molecules due to positron capture into vibrational Feshbach resonances. Resonant annihilation occurs in molecules which can bind positrons, and we analyse positron binding to alkanes using zero-range potentials. Related questions of spectra of annihilation gamma quanta and molecular fragmentation following annihilation, are discussed briefly.
PACS: 34.80.Uv – Positron scattering / 78.70.Bj – Positron annihilation / 71.60.+z – Positron states / 34.80.Gs – Molecular excitation and ionization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
