“…2. This should be compared t o the corresponding case in Be, where, in beam-foil spectra, the Be I 2s2 'S-2r2p 'Po line is usually weaker than the l s 2 r 2 p "Po-ls2pz "Ptransition in Be I1 [21]. The explanation is autoionization of the ls2p2 4P1,2,3,2,s,2 levels by the spin-spin, spin-orbit and spin-other-orbit mechanisms.…”