Jb. Greenwood et al., PRODUCTION OF STATE-PREPARED BEAMS OF MULTIPLY-CHARGED IONS FOR STUDIES OF STATE-SELECTIVE ELECTRON-CAPTURE COLLISIONS, Physica scripta. T, T73, 1997, pp. 387-389
A new apparatus which utilizes double translational energy spectroscop
y (DTES) is described. This allows studies of state-selective electron
capture by multiply charged ions in well defined states. This approac
h avoids the ambiguities inherent in the results of many previous meas
urements carried out with beams containing metastable ions. The consid
erable potential of DTES has been illustrated by measurements of one-e
lectron capture by C2+ ions in collision with Ar at 4keV.