Combined experimental and theoretical study on the differential elastic scattering cross sections for acetone by electron impact energy of 7.0-50 eV
7 págs.; 3 figs.; 1 tab. ; We report elastic differential cross sections (DCSs) for electron interactions with acetone, C3H6O. The incident electron energy range was 7.0-50 eV, and the scattered electron angular range for the differential measurements varied from 10° to 120°. The calculated cross sections were obtained with two different methodologies, the Schwinger multichannel method with pseudopotentials (SMCPP), and the independent-atom method with screening-corrected additivity rule (IAM-SCAR). The present elastic DCSs have been found to agree well with the results of IAM-SCAR calculations above 20 eV, and also with the SMC calculations below 30 eV. Although some discrepancies were found for lower energies, the agreement between the SMCPP data and the DCSs obtained with the IAM-SCAR method improves, as expected, as the impact energy increases. Comparison with previous DCSs shows good agreement albeit the present data is extended down to lower electron impact energies. We find a low-lying π∗ shape resonance located at 2.6 eV, in agreement with recent results on electron collisions with acetone [M. G. P. Homem et al., Phys. Rev. A 92, 032711 (2015)10.1103/PhysRevA.92.032711]. The presence of a σ∗ resonance is also discussed. ©2016 American Physical Society ; Acknowledge the Brazilian Agency Coordenacao de Aperfeicoamento de Pessoal de Nıvel Superior (CAPES), under CAPES/FCT Programme (Process No. 23038.002465/2014-87).E.L. acknowledges the Brazilian Agency Conselho Nacional de Desenvolvimento Cientıfico e Tecnologico (CNPq) and the Science Without Borders Programme for opportunities to study abroad. M.H.F.B. also acknowledges support from CNPq. F.F.S. acknowledges the Portuguese National Funding Agency FCT through Researcher Contract No. IF-FCT IF/00380/2014, and, together with P.L.V., Research GrantsNo. PTDC/FIS-ATO/1832/2012 and No. UID/FIS/00068/2013. This work has been partially supported by the Spanish MINECO(Project No. FIS2012-31230).We also acknowledge financial support from European Union programs (COST CM1301 and FP7-ITN ARGENT). This work was also supported by FCT-MCTES, Radiation Biology and Biophysics Doctoral Training Programme (RaBBiT, PD/00193/2012); UID/Multi/04378/2013 (UCIBIO). ; Peer Reviewed