ew routes in the formation of positively charged fragments upon electron attachmen

Autor(es)

Mendes, M. ^[1] ; Nunes, A. ^[1] ; Pereira-da-Silva, J. ^[1] ; Rodrigues, R. ^[1] ; Araujo, J. M. M. ^[2] ; de Sillva, F. Ferreira ^[1] ; Cornetta, L. M. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Nova Lisboa, NOVA Sch Sci & Technol, CEFITEC, Dept Fis, P-2829516 Caparica - Portugal

^[2] Univ Nova Lisboa, Fac Ciencias & Tecnol, LAQV, REQUIMTE, Dept Quim, P-2829516 Caparica - Portugal

^[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN PHYSICAL JOURNAL D; v. 76, n. 2 FEB 2022.
• Citações Web of Science: 0

Resumo

Electron-driven reactions of CF3CH2F have been studied focusing on the formation of the parent cation, CF3+ and CH2F+ (C-C bond cleavage) fragments as a function of the electron energy. For the three referred cations, an unpredicted shoulder structure is observed in the ion yield between 12 and 20 eV, indicating a resonant process (electron attachment). Viewing the observations as the result of a competition between the expected dissociative electron ionization and a dissociative electron attachment, we propose a new route where the formation of the transient anion, under two autodetachments, ultimately triggers the formation of positively charged fragments. The reaction e (-) + AB -> AB(-){*} -> AB{*} + e(-) -> A(+) B + 2e(-) is supported by both experimental data and scattering calculations. (AU)

• Processo FAPESP: 20/04822-9 - Quebrando a complexidade da matéria usando espalhamento inelástico ressonante de raios-x: o papel de diferentes confôrmeros e suas respectivas dinâmicas nucleares
• Beneficiário: Lucas Medeiros Cornetta
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado