Dissociative recombination of dications

摘要

Dissociative recombination (DR) of doubly-charged positive ions has been studied at the heavy ion storage ring ASTRID. Low-energy electrons were scattered on the dication of the N-2 molecule, and the absolute cross section was measured in the energy range of 10(-4)-50 eV. From the measured cross section, a thermal rate coefficient of 5.8x10(-7) cm(3) s(-1) at 300 K was extracted. Furthermore, we present new results on the CO2+ DR rate, and a summary and comparison of measured DR rate coefficients for both the singly and doubly-charged ions of CO, CO2, and N-2 is presented. (C) 2003 American Institute of Physics. [References: 42]