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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2000

Charge dependence of electron emission in swift heavy-ion collisions with carbon

Résumé

We report on the charge dependence of electron yields from sputter-cleaned amorphous carbon targets bombarded with an isotachic set of swift ions. The experiments were performed in a UHV setup at the heavy-ion accelerator GANIL in Caen. The ion velocity was 19 a.u. (corresponding to a kinetic energy of 9.2 MeV/nucleon) and the projectile charge QP was varied from 6 to 39. As observed for ion-atom collisions, the electron yield exhibits a reduction with respect to a Q2P law. We show that this projectile charge dependence is consistent with a strong saturation of low-energy primary electron ejection. This effect is related to the primary projectile-target interaction itself and not to high-charge effects affecting the electron transport before escape from the target.
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Dates et versions

hal-00994428 , version 1 (21-05-2014)

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M. Beuve, M. Caron, B. Gervais, H. Rothard. Charge dependence of electron emission in swift heavy-ion collisions with carbon. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2000, 62 (13), pp.8818-8823. ⟨10.1103/PhysRevB.62.8818⟩. ⟨hal-00994428⟩
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