Coherence in two-electron transfer in F8++Ne collisions

The formation of projectile autoionizing 2l2l ' states has been investigate d for 0.5-1.75 MeV/u (v = 4.5-8.4 a.u) F8+ projectiles colliding with neon. Double transfer to 2l2l ' configurations is found to occur with much highe r probability than transfer excitation. Most of the double capture events a re attributed to the transfer of two K-shell electrons, or a K-shell electr on plus an L-shell electron, A large contribution from the 1s(2s2p(3)P) P-4 state is observed. Apparent anomalies in the observed relative intensities of the 1s(2s2p(3)P) P-2 and the 1s(2s2p(1)p) P-2(+) states are ascribed to quantum mechanical interference effects.