Production of electronically excited NO via DEA to NO2

摘要

Dissociative electron attachment (DEA) to NO2 in the 7-11 eV range is studied using velocity slice imaging technique. Two distinct channels are observed in the DEA corresponding to O- + NO(A(2)Sigma(+)) and O- + NO(C-2 Pi and/or D-2 Sigma(+)). While NO(Lambda(2)Sigma(+)) is found to be formed only in very high vibrational levels, NO(C-2 Pi and/Or D-2 Sigma(+)) is found to be formed with vibrational distribution starting from v = 0. From the angular distribution of the O- ions leading to the NO(C-2 Pi and/or D-2 Sigma(+)) channel, we obtain the symmetry of the negative ion resonance to be dominantly B-1 with small contribution from B-2.