Abstract
Values of sums of transition probabilities and mean lives associated with the 2 s 2 (Paschen notation) laser level in Ne I have been determined under various theoretical assumptions and are presented in comparison with available experimental results. Also, using intermediate coupling and the Hartree-Fock-Slater approximation, the probability of the 2 s 2 → 2 p 6 1 S 0 (626·8Å) transition was calculated and found to be 8·8×10 7 sec -1 The theoretical values were found to be in agreement with an extrapolation to zero pressure of a series of linewidth measurements of the 11 520 Å laser transition but in disagreement with the lifetime of the 2 s 2 level as determined from a delayed-coincidence experiment.
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