High-velocity limit for the ratio of helium double-to-single ionization for highly charged, bare-ion impact.
Ullrich
J
Moshammer
R
Berg
H
Mann
R
Tawara
H
Dörner
R
Euler
J
Schmidt-Böcking
H
Hagmann
S
Cocke
CL
Unverzagt
M
Lencinas
S
Mergel
V