Positron scattering from pyrazine

D. Edwards, D. Stevens, Z. Cheong, V. Graves, J. D. Gorfinkiel, F. Blanco, G. Garcia, M. J. Brunger, R. D. White, J. P. Sullivan

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The present paper provides a joint experimental and theoretical study of positron scattering from pyrazine. Experimental data were measured employing a low-energy positron beamline, and covered an energy range from 1 to 79 eV. Cross sections were measured for total scattering, total elastic scattering, positronium formation, direct ionization, and the sum of the total discrete electronic-state excitation processes. In addition, measured total electronic excitation cross sections for the individual 11B3u, 11B2u, 11B1u, and 21B2u states are also reported. Finally, experimental elastic differential cross sections (DCSs), here in the energy range 1-20 eV, are also presented. Results from two theoretical approaches are given: the R-matrix approach and the independent atom method with screening corrected additivity rule and interference terms. Where a comparison between our experimental and theoretical results could be made, the level of accord varied from being quite good to marginal depending on the actual scattering process under consideration. Last, a comparison between the present elastic DCS results and those from our earlier study on positron scattering from pyrimidine [Palihawadana, Phys. Rev. A 88, 012717 (2013)PLRAAN1050-294710.1103/PhysRevA.88.012717] showed a somewhat unexpected level of agreement.

Original languageEnglish
Article number042807
Number of pages12
JournalPhysical Review A
Volume104
Issue number4
DOIs
Publication statusPublished - Oct 2021

Keywords

  • positron scattering
  • Pyrazine
  • Positron Emission Tomography (PET)
  • total scattering
  • positronium formation

Fingerprint

Dive into the research topics of 'Positron scattering from pyrazine'. Together they form a unique fingerprint.

Cite this