Novel mechanism for creating long-lived metastable atomic negative ions

30th International Conference on Photonic, Electronic, and Atomic Collisions

Felfli, Zineb^1 ; Msezane, Alfred^1

Department of Physics and CTSPS, Clark Atlanta University, Atlanta

GA

30314, United States^1

关键词: Complex atoms;    Core polarization;    D orbitals;    Effective potentials;    Elastic cross sections;    Orbitals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/6/052014/pdf
DOI  :  10.1088/1742-6596/875/6/052014

来源: IOP

【 摘 要 】

Synopsis A novel mechanism is proposed for creating long-lived metastable atomic negative ions in complex atoms. It exploits the orbital collapse of the 5d orbital in Gd (Z=64) into the 4f orbital of Tb (Z=65). In the region of collapse the properties of the 5d and 4f orbitals are quite sensitive to the changes in the effective potential. Consequently the collapse phenomenon impacts significantly the core-polarization interaction in the relevant atoms. The mechanism is demonstrated in Tb and Dy through the appearance of long-lived Tb and Dy anions in the Regge-pole calculated electron elastic cross sections.