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

Published

October 12, 2021

Author(s)

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

Abstract

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 k_L), whereas the total removal rates of v=1-4(6x10^-10cmu3^ molecule^-1s^{-16) are faster at 0.7 k_L, 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 3.0X10}u-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].

Citation

Journal of Physical Chemistry

Pub Type

Journals

Keywords

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

Citation

Kato, S. , Bierbaum, V. and Leone, S. (2021), Multiquantum vibrational deactivation of N₂+(V) by collisions with N₂ and O₂ at thermal energy, Journal of Physical Chemistry (Accessed October 13, 2025)