Article

Absolute charge transfer and fragmentation cross sections in He2+-C60 collisions.

Laboratoire de Collisions, Agrégats et Reactivité, UMR 5589 CNRS, Université Paul Sabatier 3, 31062 Toulouse, France.
Physical Review Letters (impact factor: 7.37). 05/2008; 100(18):183401. pp.183401
Source: PubMed

ABSTRACT We have determined absolute charge transfer and fragmentation cross sections in He2++C60 collisions in the impact-energy range 0.1-250 keV by using a combined experimental and theoretical approach. We have found that the cross sections for the formation of He+ and He0 are comparable in magnitude, which cannot be explained by the sole contribution of pure single and double electron capture but also by contribution of transfer-ionization processes that are important even at low impact energies. The results show that multifragmentation is important only at impact energies larger than 40 keV; at lower energies, sequential C2 evaporation is the dominant process.

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Keywords

cross sections
 
dominant process
 
impact energies larger
 
impact-energy range 0.1-250 keV
 
low impact energies
 
pure single
 
sequential C2 evaporation
 
sole contribution
 
transfer-ionization processes