Department of Physics
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 Tbˉ and Dyˉ anions in the Regge-pole calculated electron elastic cross sections.
Felfli, Zineb and Msezane, Alfred, "Novel mechanism for creating long-lived metastable atomic negative ions" (2017). Clark Atlanta University Faculty Publications. 46.
Journal of Physics: Conference Series, Volume 875
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