title: Interatomic Coulombic decay as a new source of low energy electrons in slow ion-dimer collisions.
abstract: We provide the experimental evidence that the single electron capture process in slow collisions between O^{3+} ions and neon dimer targets leads to an unexpected production of low-energy electrons. This production results from the interatomic Coulombic decay process, subsequent to inner-shell single electron capture from one site of the neon dimer. Although pure one-electron capture from the inner shell is expected to be negligible in the low collision energy regime investigated here, the electron production due to this process overtakes by 1 order of magnitude the emission of Auger electrons by the scattered projectiles after double-electron capture. This feature is specific to low charge states of the projectile: similar studies with Xe^{20+} and Ar^{9+} projectiles show no evidence of inner-shell single-electron capture. The dependence of the process on the projectile charge state is interpreted using simple calculations based on the classical over the barrier model.
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: W
authors: W
authors: Iskandar
authors: Department of Chemistry, Tokyo Metropolitan University, 1-1 Minamiosawa, Hachiouji-shi, Tokyo 192-0397, Japan.
authors: J
authors: J
authors: Matsumoto
authors: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors: A
authors: A
authors: Leredde
authors: LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, 14050 Caen Cedex 04, France.
authors: X
authors: X
authors: Fléchard
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: B
authors: B
authors: Gervais
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: S
authors: S
authors: Guillous
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: D
authors: D
authors: Hennecart
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: A
authors: A
authors: Méry
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: J
authors: J
authors: Rangama
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: C L
authors: CL
authors: Zhou
authors: Department of Chemistry, Tokyo Metropolitan University, 1-1 Minamiosawa, Hachiouji-shi, Tokyo 192-0397, Japan.
authors: H
authors: H
authors: Shiromaru
authors: CIMAP, CEA-CNRS-ENSICAEN, BP 5133, F-14070 Caen cedex 5, France.
authors: A
authors: A
authors: Cassimi