Dielectronic recombination coefficient for Ni-like gadolinium
Abstract
Dielectronic recombination (DR) coefficients for the ground-state ion of Ni-like Gd64 have been calculated in the isolated-resonance approximation for temperatures in the range of 0.05≤T≤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 3d-14lnl’ (n≤10), 3p-14lnl’ (n≤5), and 3s-14lnl’ (n≤5) configurations. The dielectronic recombination coefficients for Ni-like Gd64 from the present calculations are 1.33×10-10 and 1.08×10-10 cm3/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 Gd64 by a factor of 5 for T≥250 eV.
- Publication:
-
Physical Review A
- Pub Date:
- May 1987
- DOI:
- 10.1103/PhysRevA.35.4129
- Bibcode:
- 1987PhRvA..35.4129C