Abstract
Dielectronic recombination (DR) coefficients for the ground-state ion of Ni-like $_{64}\mathrm{Gd}$ have been calculated in the isolated-resonance approximation for temperatures in the range of 0.05\ensuremath{\le}T\ensuremath{\le}3 keV. The Auger and radiative rates of each doubly excited state were evaluated explicitly by using the multiconfiguration Dirac-Fock model. The calculations were carried out in the intermediate coupling. The effect of the configuration interaction was also included for the low-lying doubly excited states. The intermediate autoionizing states included in the present work are the states from the 3${d}^{\mathrm{\ensuremath{-}}1}$4lnl' (n\ensuremath{\le}10), 3${p}^{\mathrm{\ensuremath{-}}1}$4lnl' (n\ensuremath{\le}5), and 3${s}^{\mathrm{\ensuremath{-}}1}$4lnl' (n\ensuremath{\le}5) configurations. The dielectronic recombination coefficients for Ni-like $_{64}\mathrm{Gd}$ from the present calculations are 1.33\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$ and 1.08\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$ ${\mathrm{cm}}^{3}$/sec for T=500 and 800 eV, respectively. The semiempirical Burgess-Merts formula has been found to overestimate the dielectronic recombination coefficients for the Ni-like $_{64}\mathrm{Gd}$ by a factor of 5 for T\ensuremath{\ge}250 eV.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call