Vibrational Quenching of CN- in Collisions with He and Ar

Abstract

The vibrational quenching cross sections and corresponding low-temperature rate constants for the v = 1 and v = 2 states of CN- colliding with He and Ar atoms have been computed ab initio using new three dimensional potential energy surfaces. Little work has so far been carried out on low-energy vibrationally inelastic collisions for anions with neutral atoms. The cross sections and rates calculated at energies and temperatures relevant for both ion traps and astrochemical modelling, are found by the present calculations to be even smaller than those of the similar C2- /He and C2-/Ar systems which are in turn of the order of those existing for the collisions involving neutral diatom-atom systems. The implications of our finding in the present case rather small computed rate constants are discussed for their possible role in the dynamics of molecular cooling and in the evolution of astrochemical modelling networks.

arXiv admin note: substantial text overlap with arXiv:2010.14288

References in corpus (6)

• Oxygen Chemistry in the Circumstellar Envelope of the Carbon-Rich Star IRC+10216
• Laser Cooling of Molecular Anions
• Time-Domain Measurement of Spontaneous Vibrational Decay of Magnetically Trapped NH
• Rovibrational quenching of C${}_2$-anions in collisions with He, Ne, and Ar atoms
• Associative detachment (AD) paths for H and CN- in the gas-phase: astrophysical implications
• High-resolution infrared action spectroscopy of the fundamental vibrational band of CN+

Cited by in corpus (1)

• Overtone Transition $2{\nu }_1$ of ${\text{HCO}}^{+}$ and ${\text{HOC}}^{+}$: Origin, Radiative Lifetime, Collisional Quenching