Quenching of N2(A 3Σ+u) by I2

Production and decay of N2(A 3Σ+u) (v=0, 1, 2) states were monitored photoelectrically from the sensitized fluorescence of NO γ bands. These states were produced by collisional transfer from excited Xe (1S4) which in turn was produced by radiative energy transfer via resonance radiation (147 nm) from a closely coupled Xe flash lamp. The rate coefficient for the deactivation of N2(A 3Σ+u) by I2 was measured as kI2= 6.9±1.9×10−12 cm3/sec. The deactivation by NO itself was measured as kNO=4.5±0.5×10−11 cm3/sec.