Positron scattering from pyrazine

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. Finally, differential (DCSs), here in $1--20$ eV, presented. Results two approaches given: R-matrix approach independent atom method with screening corrected additivity rule interference terms. Where comparison between our results could be made, level accord varied being quite good marginal depending on actual process under consideration. Last, DCS those earlier pyrimidine [Palihawadana et al., Phys. Rev. A 88, 012717 (2013)] showed somewhat unexpected agreement.