Capture of quasifree electrons into highly charged, heavy projectiles

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Abstract

In collisions between highly charged, heavy ions and light target atoms at adiabaticity parameters of 0.5 ≤ v2u2 ≤ 0.75, resonant transfer and excitation (RTE) is an important charge-exchange process. Experiments for medium Z-ions are reviewed. Special emphasis is given to the competing radiative electron capture (REC) process. The general dependences of REC are discussed. In particular, we elucidate results obtained by the triple X-ray/X-ray/charge-changed particle coincidence technique for hydrogenic projectiles up to 36Kr35+ ions. With this method we could isolate a single RTE resonance, the 2s2p1P1 state, which stabilizes radiatively to the metastable 1s2s1S0 state. This state can only decay via two photon emission (2E1). Applying the triple coincidence technique we observed additional strong photon coincidences induced by cascades following REC into high projectile states.

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    1

    Part of Ph.D. thesis project, Justus Liebig Universität Giessen, Germany.

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    Notre Dame University, IN, USA

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