1970
DOI: 10.1103/physreva.1.848
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Energy-Loss Spectra and Collision Cross Sections for Impact of 20-120-keV Positive Ions on Molecular Nitrogen

Abstract: Inelastic energy-loss spectra induced by impact of H, H2, and Ar on N& have been measured at incident ion energies of 20-120 keV, with an energy resolution of about 2 eV. Prominent peaks are observed at energy losses of 9.5 and 13.8 eV. The first of these is well resolved and is attributed to excitation of the Lyman-Birge-Hopfield (LBH) system of N2. The peak at 13.8 eV is believed due primarily to excitation of the b mz band of the Worley-Jenkins series. The locations of these features on the energy-loss scal… Show more

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Cited by 28 publications
(7 citation statements)
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“…In these spectra, the elastic peak is again well resolved, but now there is a peak at Q = -7.8 eV (peak A') and a slight shoulder at Q = -12.0 eV (peak B'). The peak A' has been observed by other investigators (Schowengerdt and Park 1970) and is probably due to singlet-triplet transitions in N, due to coupling of the electronic spins of the He' electron with the N, electrons. The shoulder B' is best attributed to a transition to either the c 311u or E states.…”
Section: He2' + N2 Scatteringsupporting
confidence: 68%
“…In these spectra, the elastic peak is again well resolved, but now there is a peak at Q = -7.8 eV (peak A') and a slight shoulder at Q = -12.0 eV (peak B'). The peak A' has been observed by other investigators (Schowengerdt and Park 1970) and is probably due to singlet-triplet transitions in N, due to coupling of the electronic spins of the He' electron with the N, electrons. The shoulder B' is best attributed to a transition to either the c 311u or E states.…”
Section: He2' + N2 Scatteringsupporting
confidence: 68%
“…In this paper, we approximate the average energy dissipation in ionization by either process with $30 eV per collision (single W value). Therefore, charge exchange results in an energetic H with a resulting energy loss and deposition into the atmosphere of $30 eV (Jasperse and Basu, 1982;Schowengerdt and Park, 1970). The new energetic neutral is no longer guided by the local magnetic field and travels through Titan's atmosphere with relatively little energy loss until it undergoes ionization or is detected by INCA.…”
Section: Article In Pressmentioning
confidence: 97%
“…Significant increases are called for in the proton and H‐atom LBH cross sections associated with the LBH yields in Figure 5. These cross sections are discussed by Strickland et al [1993] and here we note that the proton cross section was constructed from energy loss measurements by Moore [1972] below 5 keV and by Schowengerdt and Park [1970] above 20 keV [see Moore , 1972, Figure 5]. The constructed cross section should be a lower limit to the emission cross section since only direct energy loss to the N 2 (a) state was being measured (cascading increases the direct emission component arising from a state excitation by electrons).…”
Section: Scaling Emission Yieldsmentioning
confidence: 99%