“…At low energies the CO 2 Π shape resonance at 1.6 eV is well known and found to lead to complicated structures in the observed cross sections (Haddad and Milloy 1983, Allan 1989, Gibson et al 1996, Poparić et al 2006, Allan 2010) which result in significant enhancements in the vibrational excitation cross sections (Campbell et al 2011, Laporta et al 2012. At higher energies (10-14 eV) studies have pointed towards a number of narrow resonances associated with the excited (Rydberg-like) electronic states of the CO molecule in this region (Mazeau et al 1975, Wallbank et al 1983, Newman et al 1983, Polley and Bailey 1988, Middleton et al 1993, Olszewski et al 1998.…”