Rate coefficients at 300 K for the vibrational energy transfer reactions from N2(v=1) to O+2(v=0) and NO+(v=0)

摘要

Rate coefficients for the reactions N2(v=1)+O+2(v=0)rarr;N2(v=0)+O+2(v=1) and N2(v=1)+NO+(v=0)rarr;N2(v=0)+NO+(v=1) have been measured in a SIFT/flowing afterglow system at 300 K, the first measurements of thermal energy vibrational transfer from neutrals to ions. The values arek=1times;10minus;12and 10minus;13cm3sminus;1, respectively. These values are consistent with an intermediate complex vibrational predissociation model which has been successful in rationalizing earlier ion vibrational relaxations by neutral collisions. The NO+result establishes that the efficient quenching of NO+(v=1) by N2is not a resonantVrarr;Vprocess as was previously assumed.