Regular Article

Theoretical and experimental cross sections for electron scattering from halothane

¹ Departamento de Fsica, Universidade Federal do Paraná, Caixa Postal 19044, 81531-980 Curitiba, Paraná, Brazil
² Departamento de Estructura de la Materia, Física Térmica y Electrónica, Universidad Complutense de Madrid, Plaza de Ciencias 1, 28040 Madrid, Spain
³ Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Serrano 113-bis, 28006 Madrid, Spain
⁴ Centre for Medical Radiation Physics, University of Wollongong, Wollongong, NSW 2522, Australia
⁵ Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal

^a e-mail: bettega@fisica.ufpr.br
^b e-mail: g.garcia@csic.es
^c e-mail: plimaovieira@fct.unl.pt

Received: 10 May 2019
Revised: 27 May 2019
Published online: 21 August 2019

Abstract

We report a joint theoretical and experimental study on elastic scattering of electrons from halothane (CF₃CHBrCl). The theoretical differential, integral and momentum transfer cross sections were obtained with the Schwinger multichannel method implemented with pseudopotentials (SMCPP), and with the independent atom model with screening corrected additivity rule including interference effects (IAM-SCAR+I). The differential cross sections measurements were conducted for incident electron energies of 10, 20, 30 and 50 eV, while the scattered electron angular range varied from 7° to 100°. At these energies the present experimental differential cross sections are in reasonable agreement with both SMCPP and IAM-SCAR+I calculations. As expected, the two theoretical methodologies agree well with each other as the electron impact energy increases. We also discuss the presence of low-energy resonances and a bound anion state identified in our SMCPP calculations.