Study of the radiative electron attachment and photodetachment processes for the C2H/C2H- and C4H/C4H- molecules

Abstract

The photodetachment cross sections of the C2H− and C4H− molecular anions in their ground electronic and vibrational states are determined using the R-matrix approach. The obtained results are compared with available experimental data of absolute photodetachment cross sections. In addition, cross sections for the inverse process, i.e., radiative electron attachment, have also been determined and are used to obtain the corresponding thermally-averaged rate coefficients. At a temperature of 300 K, the rate coefficients are 2.3 × 10-16 and 18 × 10-16 cm3/s for C2H− and C4H−, respectively.