Electron-impact excitation of the B 1Σ+, C 1Σ+ and E 1Π states of CO at 100 eV

A distorted-wave study of electronic excitation to some low-lying states of CO by electron impact

“…In figures 7(a)-(f ) we show our DWA DCS for the X 1 → B 1 + transition in CO at 20, 30, 40, 50, 80 and 100 eV, respectively. The experimental data of Trajmar et al (1971) at 20 eV, of Middleton et al (1994) in the 20-50 eV range and of Kanik et al (1993) at 100 eV are also shown. There are no reported theoretical data for this transition.…”

“…Integral cross sections for the excitation of the a 3 state of CO by electron impact in the energy range from threshold up to 50 eV were measured by LeClair et al (1994) and up to 70 eV by Furlong and Newell (1996). Cross sections for excitations leading to the B 1 + , C 1 + and E 1 states at 100 eV have also been measured by Kanik et al (1993). Calculations of excitation cross sections in the low-incident energy range (from threshold up to 30 eV) were reported by Weatherford and Huo (1990) and by Sun et al (1992) using the Schwinger multichannel method (SMC), and by Morgan and Tennyson (1993) using the R-matrix method.…”

Analytic Cross Sections for Electron Collisions With Co, Co2, and H2o Relevant to Edge Plasma Impurities

“…To estimate the excitation cross sections at other impact energies, we have assumed the energy dependence to be identical to the respective emission cross sections corresponding to the transitions from the (B 1 + ; v = 0) and (C 1 + ; v = 0) bands to the ground (X 1 + ; v = 0) band (see Graphs 17 and 18). Kanik et al [16] also reported an absolute cross section of 4.43 × 10 −18 cm 2 for excitation to the (E 1 ; v = 0) band at 100 eV. This value was used by Ciocca et al [17] to normalize the excitation function they measured.…”

“…Wells et al [14] and Manson and Newell [15] measured the cross sections for excitation to the I 1 − state (Graph 11). Kanik et al [16] measured the cross sections for excitation to the B 1 + (Graph 12) and C 1 + (Graph 13) states at 100 eV impact energy by using electron energy-loss spectroscopy. The experimental uncertainty is estimated to be ±26%.…”

First Analysis of the 1–v″ Progression of the Ångström (B1Σ+–A1Π) Band System in the Rare 13C17O Isotopologue

“…The B 1 Σ + Rydberg state, taking part in different rovibronic transitions within the energetic structure of carbon monoxide, has been the subject of preliminary and more advanced experimental analyses in the ordinary 12 C 16 O molecule, using conventional as well as laser methods. − Far fewer experimental studies have been carried out taking into account this state in other CO isotopologues. ,,− The above-mentioned publications also indicate that only the v = 0, 1 vibrational levels are involved in emission from the B 1 Σ + state, whereas, the remaining existing vibrational levels take part only in absorption transitions: B 1 Σ + ( v = 2), B 1 Σ + ( v = 3), together with the recently analyzed B 1 Σ + ( v = 6) state, recorded in the 6–0 band of the transition from the X 1 Σ + ground state of the following isotopologues: 12 C 16 O, 13 C 16 O, and 13 C 18 O by Eidelsberg et al As regards the analysis of B 1 Σ + state in the very rare 12 C 17 O and 13 C 17 O isotopologues, pioneering and experimental works have been recently published by Hakalla et al for the 13 C 17 O molecule and by Hakalla et al for the 12 C 17 O molecule.…”