Differential cross sections for elastic scattering of electrons from argon and krypton as a continuous function of energy

Abstract

Using a low-resolution electron-impact spectrometer in excitation function mode, the energy dependence of differential cross sections for elastic scattering of electrons on argon and krypton was studied. Relative cross sections were put on an absolute scale by normalizing to the previous data of Srivastava et al at one conveniently chosen energy and angle in each gas. Differential cross sections for elastic scattering of electrons on krypton are compared with previously published cross sections for positron scattering. No broad resonance-like structures are observed in the case of electron scattering but the energy dependence, especially in krypton, shows a strong variation with energy which is not observed for positrons.

Quantification of surface-sensitive electron spectroscopies

“…We see a considerable difference between DCSs for Ar and Xe calculated for the TFD potential and the DHF potential. However, the published experimental DCSs [68][69][70][71][72][73][74][75][76][77][78][79] seem to be closer to the DCSs calculated for the latter potential. Thus, the DHF potential should be recommended for use in calculations of DCSs.…”

“…A parameter that can be conveniently used for that purpose is the stopping power (SP). It is defined as the energy change, dE, per increment of distance, dx, along the trajectory, [68][69][70][71][72][73][74][75][76] and those for xenon from Refs. [76][77][78][79].…”

Equivalent of a cartilage tissue for simulations of laser-induced temperature fields

“…On the other hand, large electron currents provided large counting rates and, hence, very good statistics. The incident energy scale was checked by comparing present minima positions in energy-dependent DCSs at fixed scattering angles with results of Cvejanović and Crowe (1997), which were measured as a function of electron energy. A very good agreement was found, both for krypton and argon.…”

“…The normalization has been obtained according to the absolute DCS values tabulated by Cvejanović and Crowe (1997), except for the lowest incident energies of 20 eV and 30 eV, where the present DCSs were normalized directly to the absolute cross sections of Srivastava et al (1981). The calibration to the absolute scale of the all relative DCSs above 120 eV has been obtained via normalization to a single point (200 eV, 50 • ), by the following procedure.…”

“…The calibration to the absolute scale of the all relative DCSs above 120 eV has been obtained via normalization to a single point (200 eV, 50 • ), by the following procedure. The experimentally obtained energy-dependent DCS at 50 • was normalized at 200 eV to the absolute value of Cvejanović and Crowe (1997), and then used for calibration of the relative angle-dependent DCSs at the incident energies from 130 eV to 260 eV. The experimentally obtained energy-dependent DCSs at other fixed angles were normalized at 200 eV to the present data.…”