Relative total–cross-section measurements for collisions of low-energy electrons (10–25 eV) withN2and CO

Absolute differential cross sections for electron-impact excitation of CO near threshold: II. The Rydberg states of CO

“…Feshbach resonances in the electronic excitation of CO have been observed in metastable excitation functions (Newman et al 1983, Brunt et al 1978 and in total electron-impact cross sections (see, e.g. Sanche andSchulz 1972, Polley andBailey 1988). The modified Rydberg formula developed by Brunt et al (1978, and references therein) shows the orbital energies of the 3sσ , 3pσ and 3pπ electrons to be 3.52, 2.70 and 2.57 eV, respectively.…”

“…Sanche andSchulz 1972, Polley andBailey 1988). The modified Rydberg formula developed by Brunt et al (1978, and references therein) shows the orbital energies of the 3sσ , 3pσ and 3pπ electrons to be 3.52, 2.70 and 2.57 eV, respectively.…”

Electron collisions with CO molecule: potential energy curves of higher lying CO− resonant states

“…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.…”

Electron-impact high-lying N2− resonant states

“…However, experiments have shown that CO also has a number of, perhaps as many as eight [22], narrow Feshbach resonances at energies ranging from 10 to 14 eV. These resonances have been extensively studied experimentally using both collision studies [1,[23][24][25][26][27][28][29][30] and studies of dissociative electron attachment (DEA) [31][32][33][34]. One reason why the higher resonances in N 2 are less well studied than those in CO is that both C and O support stable anion states while N does not.…”