Transport collision integrals of interacting atoms or ions are essential in modeling transport properties high-temperature gases and plasmas. Here, we obtained the potential energy curves (PECs) CH using state-of-the-art ab initio methods. The PECs were also extrapolated to investigate for C(3P)-H(2S), C(5S)-H(2S), C(1S)-H(2S), C(1D)-H(2S) interactions, which interactions between excited C(5S),...