Regular Article – Atomic and Molecular Collisions
Absolute partial and total ionization cross sections for electron impact ionization of 2-butanol
Departamento de Física, Universidade Federal de Juiz de Fora, 36936-900, Juiz de Fora, MG, Brazil
2 College of Science and Engineering, Flinders University, GPO Box 2100, 5001, Adelaide, SA, Australia
3 Departamento de Estructura de la Materia, Física Térmica y Electrónica e IPARCOS, Universidad Complutense de Madrid, 28040, Madrid, Spain
4 Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Serrano 113-bis, 28006, Madrid, Spain
5 Institute of Actuarial Science and Data Analytics, UCSI University, 56000, Kuala Lumpur, Malaysia
Accepted: 7 August 2023
Published online: 7 September 2023
Partial ionization cross section (PICS) measurements of the cations created through electron impact in the energy range from threshold ionization to 100 eV have been undertaken for 38 cations of 2-butanol, using a HIDEN quadrupole mass spectrometer (EPIC 300) with a mass resolution of 1 amu. These PICSs, which are being presented here for the first time, correspond to the cationic fragments with the highest intensity signal registered in our 2-butanol mass spectrum reported previously (Amorim et al. in Eur J Phys D 76:207, 2022). Experimental and theoretical total ionization cross sections (TICSs) for the electron impact of 2-butanol are also reported here, where the agreement between measured and calculated TICS over their common energy regimes was, allowing for the measurement uncertainties, typically quite good. Based on the previously reported appearance energy values and the PICSs profiles reported here, we propose some ionic fragmentation mechanisms for this molecule.
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