| Full text | |
| Author(s): Show less - |
Hlousek, B. A.
;
Martin, M. F.
;
Khakoo, M. A.
;
Zawadzki, M.
;
Moreira, G. M.
;
Maioli, L. S.
;
Bettega, M. H. F.
;
Machado, L. E.
;
da Mata, V. A. S.
;
da Silva, A. J.
;
Iga, I.
;
Lee, M-T
;
Homem, M. G. P.
Total Authors: 13
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW A; v. 100, n. 5, p. 12-pg., 2019-11-26. |
| Abstract | |
We present experimental and theoretical cross sections for elastic electron scattering from CHCl3. This is an important target because of its relevance to environmental chemistry and the plasma etching industry as a source of chlorine radicals. The experimental results were obtained at incident electron energies ranging from 0.5 to 800 eV in the 10 degrees-130 degrees scattering angle range. Theoretically, the scattering cross sections in the low-energy region were obtained by using the Schwinger multichannel method with pseudopotentials in the static-exchange plus polarization approximation. Additionally, in the low- and intermediate-energy ranges, theoretical calculations were also performed using a molecular complex optical potential and a single-center expansion method combined with Pade approximation. Further calculations using the independent atom model were also made at intermediate energies. Momentum-transfer cross sections were derived by integrating the differential cross sections. In general, there is a good agreement between the experimental data and the theoretical results. Moreover, the calculations reveal the presence of three shape resonances in the elastic channel, located at 0.5, 2, and 8 eV. The two higher-lying resonances were confirmed by the present experiments, whereas the positions of the two lower-lying resonances agree well with previous results of electron attachment experiments. (AU) | |
| FAPESP's process: | 15/08258-2 - Cross sections for the interaction of electrons with volatile organic molecules |
| Grantee: | Manoel Gustavo Petrucelli Homem |
| Support Opportunities: | Regular Research Grants |