IRON Project. XXXIII.

Contributions from configuration interaction and relativistic corrections are carefully studied, in particular the spin-spin interaction that is shown to be of considerable importance for low Z. By extensive comparisons with other theoretical datasets and measurements of the ^5^S^o^_2_ radiative lifetime and the B=A(^5^S^o^_2_-^3^P_2_)/A(^5^S^o^_2_-^3^P_1_) branching ratio, we are able to assign accuracy ratings to the present transition probabilities.

The transitions to the ground term are believed to be accurate to better than 10% whereas the smaller A-values belonging to transitions to the ^1^D_2_ are not expected to be accurate to more than 20%. *****************************************************************************