Mass Spectrometric Studies of Atom Reactions. II. Vibrationally Excited N2 formed by the Reaction of N Atoms with NO

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Abstract
A mass spectrometric method was used to show that 75±5% of the nitrogen formed by the reaction N+NO→N2*+Ohas more than the 24 kcal/mole of excess energy required to decompose ozone. The rate constant for the reaction N2*+O3→O2+O+N2was found to be (5.4±1.1)×10—13 cm3 molecule—1 sec—1. The rate of collisional deactivation of N2* to vibrational levels below the fourth was found to be 3.5×10—16 cm3 molecule—1 sec—1 with unexcited N2 and 1.3×10—15 cm3 molecule—1 sec—1 with N2O as the collision partners. If loss of vibrational energy occurs mainly by single quantum jumps, the measured deactivation rate constant is less than that for a single quantum jump by the ratio of the number of molecules in the fourth level to those in all levels above the third.