DIELECTRONIC RECOMBINATION PROCESS OF BE-LIKE C AND FE IONS

The dielectronic recombination process from Li-like to Be-like ions is studied. The radiative transition probability (A(r)) and autoionizati on rate (A(a)) from the doubly excited states 1s(2)2pnl of the C2+ ion and those from the 1s(2)2pnl and 1s(2)3lnl' states of the Fe22+ ion a re calculated with the use of Cowan's code. For large n, extrapolation is adopted for A(r) and A(a). Furthermore, the dielectronic recombina tion rate coefficient to the excited state 1s(2)2snl is obtained from A(r) and A(a). It is found that the dielectronic recombination process to the highly excited states dominates for the C2+ ion, whereas for t he Fe22+ ion that to the low bound state dominates. (C) 1997 Elsevier Science S.A.