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Electron impact excitation rate coefficients for Ni-like gadolinium
Authors:T.-M. Shen  C.-Y. Chen  Y.-S. Wang  Y.-M. Zou
Affiliation:(1) Shanghai EBIT Lab, Modern Physics Institute, Fudan University, Shanghai, 200433, P.R. China;(2) The key lab of Applied Ion Beam Physics, Ministry of Education, P.R. China
Abstract:A detailed and large-scaled calculation is performed on the total electron impact excitation rate coefficients from the ground state to the 106 fine-structure levels in 3l-14l of Ni-like Gd36+ employing the relativistic configuration-interaction distorted-wave approximation. The resonance contributions from 3l174ln′′l′′ and 3l175ln′′l′′ doubly-excited states of Cu-like Gd35+ are taken into account using the isolated process and isolated resonances approximation. The effects of the radiative decays from the resonances are investigated carefully and are found to be significant. The present rate coefficients, as well as the collision strength, are compared extensively with the previously published results. We believe our results should be more accurate and reliable.
Keywords:  KeywordHeading"  >PACS 34.80.Dp Atomic excitation and ionization
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