LOW-ENERGY RECOMBINATION OF NE7+

Low-energy recombination of Ne7+ has been measured at the storage ring CRYRING with a high-energy precision of 15 meV. Using different elect ron currents the approach for correcting the variation of the ion ener gy due to the drag force was checked. A multi-configuration Breit-Paul i perturbation calculation using the program AUTOSTRUCTURE for the die lectronic recombination rates has been implemented. The cut-off of Ryd berg states by field ionization in the analysing magnet was modified b y taking radiative cascade into account. Comparison of this calculatio n with the measurement shows a good agreement in resonance strength bu t a small discrepancy in resonant energy. At very low energy, the non- resonant recombination rate is found to be a factor of 2 higher than t he estimated radiative recombination rate. No indication of an electro n density dependence is found.