Dielectronic recombination in He+ ions

Abstract Dielectronic recombination involving 1s + e − → nln ′ l ′ transitions has been investigated for He + ions. This work was done using the ion storage ring and electron cooler at the Indiana University Cyclotron Facility. Resonant maxima from DR were observed, but the energy resolution was insufficient to identify individual transitions. The magnitude of the measured cross sections appears to be about a factor of two lower than theory.