Correction to “The CH^– 3Σ^– Anion: Inelastic Rate Coefficients from Collisions with He at Interstellar Conditions”

Abstract

Metrics & MoreArticle Recommendations * sı Supporting Information CH − ( 3 Σ − ) constitutes the smallest term in the series of longer anionic polyynes that have been observed in the ISM (e.g., C 4 H − and several others). We have just discovered a computational error in the results in the original paper regarding the potential energy surface between the CH − ( 3 Σ − ) anion and the neutral He atom. The origin of this error is explained in the Introduction, and new, corrected calculations are presented and discussed.The relevant inelastic scattering cross sections and the corresponding inelastic rate coefficients are then computed again and compared with the earlier results. We find that we now obtain even smaller values for the final inelastic rate coefficients, thereby correctly confirming that possible state-changing processes induced by collisions would be a very inefficient path for modifying the rotational state populations of this anion and therefore be of marginal importance for aiding its possible observation.■ INTRODUCTION: ORIGIN OF THE COMPUTATIONAL ERRORAddition/Correction pubs.acs.org/JPCA