Investigation of positron scattering from 2H-pyran, 4H-pyran, and pyrrole molecules

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Abstract The scattering cross-sections for positron-biomolecule interaction are an essential
 input for the Monte-Carlo simulation techniques. In the present work, we have reported
 the elastic integral, differential, momentum transfer, and total ionization cross-sections for
 scattering of positron from 2H-pyran, 4H-pyran, and pyrrole molecules. The single-center
 expansion method is employed for the elastic scattering calculations and the binary-encounter
Bethe model for ionization. We have also reported the elastic integral and differential cross
sections for benzene and furan, which are structurally similar to the pyran isomers and pyrrole,
 respectively, and compared them with the experimental and theoretical data available in the
 literature to validate the efficacy of the single-center expansion method and the codes used.
 Acomparative analysis of the elastic cross-sections for the isomers: 2H-pyran and 4H-pyran,
 and the pyrrole molecule that is isoelectronic with furan is also presented.