Radiative electron attachment to rotating C${}_3$N through dipole-bound states

Abstract

The role of a large dipole moment in rotating neutral molecules interacting with low-energy electrons is studied using an accurate {\it ab initio} approach accounting for electronic and rotational degrees of freedom. It is found that theory can reproduce weakly-bound (dipole-bound) states observed in a recent photodetachment experiment with C${}_3$N${}^{-}$ [Phys. Rev. Lett. {\bf 127}, 043001 (2021)]. Using a similar level of theory, the cross section for radiative electron attachment to the C${}_3$N molecule, forming the dipole-bound states, was determined. The obtained cross section is too small to explain the formation of C${}_3$N${}^{-}$ in the interstellar medium, suggesting that it is likely formed by a different process.

References in corpus (1)

• Detection of C5N- and vibrationally excited C6H in IRC +10216

Cited by in corpus (1)

• The abundance and excitation of molecular anions in interstellar clouds