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Multiquantum vibrational deactivation of N2+(V) by collisions with N2 and O2 at thermal energy



S Kato, V M. Bierbaum, S R. Leone


Vibrational deactivation and charge transfer in the collisions of N2+(v=0-4) with N2 and O2 are studied at thermal energy. State-specific rate constants for the individual components of charge transfer and vibrational deactivation are determined using the selected-ion flow tube, laser-induced fluorescence (SIFT-LIF) technique. The N2+(v=0)+N2 raction proceeds via symmetric charge transfer at one-half the Langevin rate constant (0.5 kL), whereas the total removal rates of v=1-4(6x10-10cmu3^ molecule-1s-16) are faster at 0.7 kL, indicating that a significant amount of vibrational excitation is transferred in the N2+(v>0)+N2collisions. The N2+(v)+02 removal rates are significantly enhanced upon vibrational excitation; the total rate constant for v=4 is 3.0X10u-10^cm3 molecule-1s-1, six times larger than that for v=0. The enhancement is shown to be primarily due to invreased vibrational deactivation, although a small enhancement of the charge transfer also occurs for N2+(v≥2)+N2[M.J. Frost et al., J. Chem. Phys. 100(1994) 6359] and N2+(v=less than or equal to}2)[S.Kato et al., Can. J. Chem. 72 (1994) 625].
Journal of Physical Chemistry


ion vibrational deactivation, ion-molecule collision, laser induced fluorescence


Kato, S. , Bierbaum, V. and Leone, S. (2021), Multiquantum vibrational deactivation of N<sub>2</sub>+(V) by collisions with N<sub>2</sub> and O<sub>2</sub> at thermal energy, Journal of Physical Chemistry (Accessed April 20, 2024)
Created October 12, 2021