Elastic electron scattering from ${\mathrm{CF}}_3$I

Experimental results are reported for elastic differential and integral cross sections for electrons scattering from ${\mathrm{CF}}_3$I. These measurements were made at ten incident electron energies in the range 10–50 eV, with a scattered electron angular range of ${20}^{°}$–${135}^{°}$. Where possible, comparison is made to the only other comprehensive experimental set of results available in the literature [M. Kitajima et al., J. Phys. B 35, 3257 (2002)] and to calculated cross sections from the Schwinger multichannel with pseudopotentials method [M. H. Bettega et al., J. Phys. B 36, 1263 (2003)]. In general, quite good agreement is found between the present results and those of the earlier studies.

Figure 1

Schematic diagram of the present apparatus (see text for further details).

Figure 2

Elastic differential cross sections (${10}^{-16}$ cm${}^2$ sr${}^{-1}$) for electron impact on ${\mathrm{CF}}_3$I from SMC calculations by Bettega et al. [11] (solid line), measurements of Kitajima et al. [10] ($$), and the current measurements ($•$), for electrons of energy (a) 10, (b) 12, (c) 15, and (d) 20 eV.

Figure 3

Elastic differential cross sections (${10}^{-16}$ cm${}^2$ sr${}^{-1}$) for electron impact on ${\mathrm{CF}}_3$I from SMC calculations by Bettega et al. [11] (solid line) and the current measurements ($•$), for electrons of energy (a) 25, (b) 30, (c) 35, and (d) 40 eV.

Figure 4

Elastic differential cross sections (${10}^{-16}$ cm${}^2$ sr${}^{-1}$) for electron impact on ${\mathrm{CF}}_3$I from SMC calculations by Bettega et al. [11] (solid line) and the current measurements ($•$), for electrons of energy (a) 45 and (b) 50 eV.

Figure 5

Elastic integral cross sections (${10}^{-16}$ cm${}^2$) for electron impact on ${\mathrm{CF}}_3$I from SMC calculations by Bettega et al. [11] (solid line) and the current measurements ($•$).