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Low-Energy Electron Elastic Total Cross Sections for Ho, Er, Tm, Yb, Lu, and Hf Atoms

Department of Physics and Center for Theoretical Studies of Physical Systems, Clark Atlanta University, Atlanta, GA 30314, USA
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Atoms 2020, 8(2), 17; https://doi.org/10.3390/atoms8020017
Received: 28 March 2020 / Revised: 23 April 2020 / Accepted: 25 April 2020 / Published: 30 April 2020
The robust Regge-pole methodology wherein is fully embedded the essential electron-electron correlation effects and the vital core polarization interaction has been used to explore negative ion formation in the large lanthanide Ho, Er, Tm, Yb, Lu, and Hf atoms through the electron elastic total cross sections (TCSs) calculations. These TCSs are characterized generally by dramatically sharp resonances manifesting ground, metastable, and excited negative ion formation during the collisions, Ramsauer-Townsend minima, and shape resonances. The novelty and generality of the Regge-pole approach is in the extraction of the negative ion binding energies (BEs) of complex heavy systems from the calculated electron TCSs. The extracted anionic BEs from the ground state TCSs for Ho, Er, Tm, Yb, Lu, and Hf atoms are 3.51 eV, 3.53 eV, 3.36 eV, 3.49 eV, 4.09 eV and 1.68 eV, respectively. The TCSs are presented and the extracted from the ground; metastable and excited anionic states BEs are compared with the available measured and/or calculated electron affinities. We conclude with a remark on the existing inconsistencies in the meaning of the electron affinity among the various measurements and/or calculations in the investigated atoms and make a recommendation to resolve the ambiguity. View Full-Text
Keywords: generalized bound states; electron correlations; anionic binding energies; polarization interaction; lanthanide atoms generalized bound states; electron correlations; anionic binding energies; polarization interaction; lanthanide atoms
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MDPI and ACS Style

Felfli, Z.; Msezane, A.Z. Low-Energy Electron Elastic Total Cross Sections for Ho, Er, Tm, Yb, Lu, and Hf Atoms. Atoms 2020, 8, 17. https://doi.org/10.3390/atoms8020017

AMA Style

Felfli Z, Msezane AZ. Low-Energy Electron Elastic Total Cross Sections for Ho, Er, Tm, Yb, Lu, and Hf Atoms. Atoms. 2020; 8(2):17. https://doi.org/10.3390/atoms8020017

Chicago/Turabian Style

Felfli, Zineb, and Alfred Z. Msezane 2020. "Low-Energy Electron Elastic Total Cross Sections for Ho, Er, Tm, Yb, Lu, and Hf Atoms" Atoms 8, no. 2: 17. https://doi.org/10.3390/atoms8020017

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