Description
Title: Actinide Atoms Am, Cm, Bk, Es, No, and Lr in Low-Energy Electron Elastic Collisions: Formation of Negative Ions
Abstract: Calculation of the electron elastic total cross sections (TCSs) is used to investigate negative-ion formation in actinide atoms using the exact Regge-pole method. The TCSs are found to exhibit both atomic and fullerene molecular behavior near the threshold. They are generally characterized by negative-ion formations, shape resonances, and Ramsauer-Townsend(RT) minima. The TCSs for Am, Cm, and Bk also show a polarization-induced metastable cross section with a deep R-T minimum close to the threshold, which transforms into a shape resonance that appears very close to the threshold in the TCSs for Es, No, and Lr. These fresh manifestations are a result of the polarization interaction being significantly impacted by size effects and orbital collapse, according to us. Negative-ion binding energies (BEs) for Am, Cm, Bk, Es, No, and Lr anions created during collisions are extracted from the TCSs unambiguous and trustworthy ground, metastable, and excited states and compared with the atoms’ preexisting electron affinities (EAs). The extraction of the negative-ion BEs from the TCSs is what makes the Regge-pole method novel. We come to the conclusion that the actinide atoms’ current theoretical EAs and the recently discovered EA of Th are related to excited anionic BEs.
Keywords: generalized bound states; actinide atoms; elastic cross sections; anionic binding energies; electron correlations; core–polarization interaction; Regge poles
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
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