Article

Electronic capture and excitation of highly charged channeled ions

Centre d'Etudes Nucléaires de Bordeaux-Gradignan and IN2P3, BP 120, Le Haut Vigneau, F-33175 Gradignan Cedex, France; M. Chevallier,; D. Dauvergne,; R. Kirsch,; J.C. Poizat,; J. Remillieux; Institut de Physique Nucléaires de Lyon, IN2P3-CNRS/ Université Claude Bernard, 69622 Villeurbanne Cedex, France; C. Cohen,; Y. Girard,; A. L'Hoir,; J.P. Rozet,; D. Schmaus,; D. Vernhet; Groupe de Physique des Solides, Universités Paris VII et VI, 75251 Paris Cedex 05, France; J. Dural,; H. Rothard,; M. Toulemonde; Centre Interdisciplinaire de Recherche sur les Ions Lourds, 14040 Caen Cedex, France; Y. Quéré Laboratoire des Solides Irradiés, Ecole Polytechnique, 91128 Palaiseau, France; N. Cue; Department of Physics, University of Science and Technology, Kowloon, Hong Kong China
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms DOI:10.1016/0168-583X(94)95246-9 pp.116-123

ABSTRACT Two aspects of heavy ion channeling are presented. The first aspect is related to the fact that channeled ions interact only with the most loosely bound target electrons. One can take benefit of this feature to study processes such as radiative electron capture (REC) and resonant transfer and excitation (RTE) in a dense quasi-free electron gas. The experimental work, performed at GANIL, devoted to these two processes is described. A possible extension to Nuclear RTE or NEEC (nuclear excitation by electron capture) studies is also described. The second aspect discussed is related to the periodicity of the potential experienced by channeled ions. We show that in a well chosen case this could lead to a significant and detectable coherent excitation of the projectile nucleus.

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Keywords

aspects
 
channeled ions
 
channeled ions interact
 
chosen case
 
dense quasi-free electron gas
 
detectable coherent excitation
 
excitation
 
experimental work
 
first aspect
 
heavy ion channeling
 
nuclear excitation
 
Nuclear RTE
 
possible extension
 
projectile nucleus
 
radiative electron capture
 
REC
 
resonant transfer
 
study processes
 
two processes