Dissociative recombination dynamics of the ozone cation

摘要: The dissociative recombination of the ozone cation has been studied at heavy-ion storage ring CRYRING. total cross section and branching fractions have measured. from {approx}0eV to 0.2 eV follows a nearly E{sup -1} dependence, which was theoretically predicted be characteristic direct mechanism. thermal rate coefficient deduced 7.37x10{sup -7}(T/300){sup -0.55}cm{sup 3}s{sup -1}. fraction analysis carried out interaction energy shown strong propensity (94%) dissociate through three-body channel. Due overwhelming dominance this channel it investigated in more detail. Of six energetically available pathways only three are significantly populated, such that production O(S1) is highly unfavored all atomic oxygen fragments predominantly formed P3 D1 states. Analysis breakup geometries performed by means Dalitz plot. It observed molecules dissociating O(P3)+O(P3)+O(P3) O(P3)+O(P3)+O(D1) channels an open linear geometry where cleavage two valence bonds occurs preferentially unison, while O(P3)+O(D1)+O(D1) might proceed partly sequential