The O IV F V and Ne VI spectra have been investigated by collision spectros
copy Photons emitted by boron-like ions following berrylium-like ions - Cs
electron capture collisions have been recorded in the 60-600 Angstrom wavel
ength range. Displaced terms have been distinguished by using highly metast
able incident O4+, F5+ and Ne6+ ion beams. Previously unreported unassigned
lines have been identified. Branching ratios of 2s-2p transitions have bee
n measured.