Charge-changing cross sections of fastH0,1+andHe0,1+,2+projectiles inC60

A. Itoh, K. Nose, Y. Hamamoto, T. Mizuno, K. Ishii
2005 Physical Review A. Atomic, Molecular, and Optical Physics  
Electron capture and loss cross sections have been measured for fast light projectile ions of 0.5 MeV H 0,1+ and 0.5-2.0 MeV 4 He 0,1+,2+ in collisions with C 60 . The gaseous target of C 60 was prepared by heating C 60 powder in a target cell to temperatures of 300-500°C, and outgoing charge fractions were measured as a function of the cell temperature. Absolute cross sections are deduced by using two different vapor-pressure data available in literature. Experimental cross sections are
more » ... d in comparison with theoretical values obtained from various conventional formulas proposed for atomic targets. In addition, single-and double-electron capture cross sections are also calculated on the basis of a classical model by taking account of the local electron density of C 60 . From a complete set of our experimental cross sections, equilibrium charge fractions are also deduced and found to be essentially the same as carbon-foil data, indicating no gas-solid difference.
doi:10.1103/physreva.72.052718 fatcat:nnxitushf5bvtjpuqpyifddjim