ENERGY AND CHARGE DEPENDENCE OF THE RATE OF ELECTRON-ION RECOMBINATION IN COLD MAGNETIZED PLASMAS

We have measured electron-ion recombination rates for bare ions of D+, He2+, N7+, Ne10+ and Si14+ in a storage ring. For the multi-charged i ons an unexpected energy dependence was found, showing a strong increa se of the measured rates over the calculated radiative recombination r ate for electron beam detuning energies below the electron beam transv erse temperature. The measured enhanced rates increase approximately a s Z(2.8) with the charge state Z. A comparison of these rates with the oretical predictions for collisional-radiative recombination in the co ld magnetized electron plasma in particular three-body recombination i ncluding radiative de-excitation of electrons in Rydberg levels, is ma de.