Integral elastic, vibrational-excitation, electronic-state excitation, ionization, and total cross sections for electron scattering from para-benzoquinone

Jones, D.B., da Costa, R.F., Kossoski, F., Varella, M.T.do N., Bettega, M.H.F., Garcia, G., Blanco, F., White, R.D., Lima, M.A.P., and Brunger, M.J. (2018) Integral elastic, vibrational-excitation, electronic-state excitation, ionization, and total cross sections for electron scattering from para-benzoquinone. Journal of Chemical Physics, 148 (20). 204305.

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Abstract

We report absolute experimental integral cross sections (ICSs) for the electron impact excitation of 6 bands (Bands 0-V) of unresolved electronic-states in para-benzoquinone, for incident electron energies between 20 and 40 eV. Absolute vibrational-excitation ICSs, for 3 composite vibrational bands (Bands I-III), are also reported in that same energy range. In addition, ICSs calculated within our independent atom model (IAM) with screening corrected additivity rule (SCAR) formalism, extended to account for interference (I) terms that arise due to the multi-centre nature of the scattering problem, are also reported. The sum of those ICSs gives the IAM-SCAR+I total cross section (TCS) for electron-para-benzoquinone scattering. Where possible, those calculated IAM-SCAR+I ICSs are compared against corresponding results from the present measurements with an acceptable level of accord being obtained. Similarly, we also present results from our Schwinger multichannel method with pseudopotential (SMCPP) calculations. Here elastic ICSs and ICSs corresponding to the Bands 0-III of unresolved electronic-states are presented, with agreement between the SMCPP electronic-state ICSs and those from our measurements being in good qualitative accord. The energy range of our SMCPP computations is 16-50 eV. Using the binary-encounter-Bethe (BEB) approach, total ionization cross sections for this collision system were computed. Those total ionization cross sections were then added to our SMCPP ICS results, to derive SMCPP/BEB TCSs that are typically in very good accord with those from our IAM-SCAR+I approach.

Item ID: 54446
Item Type: Article (Research - C1)
ISSN: 1089-7690
Copyright Information: © 2018 Author(s).
Funders: Australian Research Council (ARC), Ministerio de Economía y Competitividad, Spanish Ministry (MINECO), European Cooperation in Science and Technology (COST), ITN-Marie Curie, European Union programme (EUP), São Paulo Research Foundation (FAPESP), National Council for Scientific and Technological Development, Brazil (CNPq)
Projects and Grants: ARC No. DP160120787, MINECO No. FIS2016-80440, COST No. CM301, ITN-Marie Curie No. ARGENT-608163, EUP Grant No. 305672/2014-2, FAPESP Grant No. 2015/23792-5
Date Deposited: 04 Jul 2018 08:01
FoR Codes: 02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020204 Plasma Physics; Fusion Plasmas; Electrical Discharges @ 100%
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