Spin-exchange effects in elastic electron scattering from linear triatomic radicals

M M Fujimoto,K.T Mazon,F Arretche,M.-T Lee,S E Michelin,I Iga

doi:10.1590/s0103-50532010000200006

Abstract

In this work, we present a theoretical investigation on spin-exchange effects in elastic electron collisions by two linear triatomic free radicals namely, NCN and CNN. Spin-polarization differential and integral cross sections calculated in the (1-10) eV energy range are reported. For both targets, our study has shown that the exchange between the scattering and the unpaired target electrons is strongly influenced by the occurrence of shape resonances. As a consequence, significant spin-polarization fractions are only observed in the resonance region.

Highlights

Low-energy electron collisions with atoms, molecules, radicals, and surfaces are strongly influenced by electron-exchange effects
We report calculations of SF differential cross sections (DCSs) and spin-polarization fractions (SPFs) for elastic electron scattering by CNN and NCN in the [1,2,3,4,5,6,7,8,9,10] eV energy range
The present work reports a theoretical investigation on the spin-exchange processes in the low-energy elastic electron collisions on CNN and NCN radicals

Summary

Introduction

Low-energy electron collisions with atoms, molecules, radicals, and surfaces are strongly influenced by electron-exchange effects. For C2O radical, the resonance positions in the 4Π and 2Π scattering channels are shifted from each other, resulting in the pronounced SF DCSs. Here, we extend the spin-exchange study to two linear triatomic open-shell molecules, namely CNN and NCN.

Results

Conclusion