Cosmic rays have the potential to significantly affect the atmospheric composition by increasing the rate and changing the types of chemical reactions through ion production. The amount and states of ionization, and the spatial distribution of ions produced are still open questions for atmospheric models. To precisely estimate these quantities, it is necessary to simulate particle–molecule interactions, down to very low energies. Models enabling such simulations require interaction probabilities over a broad energy range and for all energetically allowed scattering processes. In this paper, we focus on electron interaction with the two most abundant molecules in the atmosphere, i.e., N2 and O2, as an initial step. A set of elastic and inelastic cross section models for electron transportation in oxygen and nitrogen molecules valid in the energy range 10 eV – 1 MeV, is presented. Comparison is made with available theoretical and experimental data and a reasonable good agreement is observed. Stopping power is calculated and compared with published data to assess the general consistency and reliability of our results. Good overall agreement is observed, with relative differences lower than 6% with the ESTAR database.

Calculation of electron interaction models in N2 and O2 / Nicolanti, F.; Caccia, B.; Cartoni, A.; Emfietzoglou, D.; Faccini, R.; Incerti, S.; Kyriakou, I.; Satta, M.; Tran, H. N.; Mancini-Terracciano, C.. - In: PHYSICA MEDICA. - ISSN 1120-1797. - 114:(2023), p. 102661. [10.1016/j.ejmp.2023.102661]

Calculation of electron interaction models in N2 and O2

Nicolanti F.;Cartoni A.;Faccini R.;Mancini-Terracciano C.
2023

Abstract

Cosmic rays have the potential to significantly affect the atmospheric composition by increasing the rate and changing the types of chemical reactions through ion production. The amount and states of ionization, and the spatial distribution of ions produced are still open questions for atmospheric models. To precisely estimate these quantities, it is necessary to simulate particle–molecule interactions, down to very low energies. Models enabling such simulations require interaction probabilities over a broad energy range and for all energetically allowed scattering processes. In this paper, we focus on electron interaction with the two most abundant molecules in the atmosphere, i.e., N2 and O2, as an initial step. A set of elastic and inelastic cross section models for electron transportation in oxygen and nitrogen molecules valid in the energy range 10 eV – 1 MeV, is presented. Comparison is made with available theoretical and experimental data and a reasonable good agreement is observed. Stopping power is calculated and compared with published data to assess the general consistency and reliability of our results. Good overall agreement is observed, with relative differences lower than 6% with the ESTAR database.
2023
Atmosphere ionization; Electron cross sections; Geant4-DNA; Monte Carlo simulation; Particle track structure
01 Pubblicazione su rivista::01a Articolo in rivista
Calculation of electron interaction models in N2 and O2 / Nicolanti, F.; Caccia, B.; Cartoni, A.; Emfietzoglou, D.; Faccini, R.; Incerti, S.; Kyriakou, I.; Satta, M.; Tran, H. N.; Mancini-Terracciano, C.. - In: PHYSICA MEDICA. - ISSN 1120-1797. - 114:(2023), p. 102661. [10.1016/j.ejmp.2023.102661]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1689821
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