Multiple anion formation in low energy electron collisions with Tl atoms: Regge-pole prediction

TL;DR

This paper uses the complex angular momentum method to predict multiple stable negative ions of thallium formed during low-energy electron collisions, supported by comparison with experimental data for indium.

Contribution

It introduces CAM-based calculations for Tl and Ga, predicting three stable negative ions of Tl, which advances understanding of electron-atom interactions and negative ion formation.

Findings

Sharp resonances in TCSs indicate negative ion formation

Three stable Tl negative ions are predicted

Results align with experimental data for In

Abstract

The complex angular momentum (CAM) calculated low-energy 0 < E < 5 eV electron elastic total cross section (TCS) for In is benchmarked through its recently measured electron affinity (Walter et al, Phys. Rev. A 82, 032507 (2010)). The TCSs for Tl and Ga atoms are then calculated using the CAM method. From the dramatically sharp resonances in the TCSs binding energies for Tl^{-} and Ga^{-} negative ions formed during the collisions are extracted and compared with existing values. Three stable bound negative ions of Tl are predicted.