Physical Review Letters · 1985 · 56 citations · 10 references
Natural SciencesPhysicsNuclear PhysicsParticle PhysicsRadiation PhysicsAtomic CollisionsHeavy-ion PhysicsWave-particle InteractionsCollisionally Excited StatesCoulomb ExcitationElectron TransferElectron-electron InteractionsIon-atom CollisionsIon-ion CollisionsRelativistic Heavy-ion CollisionsResonant Energy Transfer
Evidence is presented for nonresonant and resonant electron transfer and projectile $K$ x-ray excitation in 15-94-MeV ${\mathrm{Si}}^{11+}$ + He collisions. In the former, the projectile $K$ electron is excited by the Coulomb field of the target nucleus, and a target electron is captured. In the latter, the electron-electron interaction gives rise to the resonant process. The nonresonant process reached its maximum cross section at \ensuremath{\sim}20 MeV, while the resonant process peaked at \ensuremath{\sim}85 MeV, in agreement with theory.
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