Experimental and theoretical cross sections for elastic electron scattering from zinc

Abstract

We report on experimental elastic differential and integral cross sections for electron scattering from zinc. The energy range of these measurements is 10-100 eV, while the scattered electron angular range in the differential cross-section data is 10 •-150 •. We also supplement our measured data with applications of our optical potential and relativistic optical potential approaches to this problem. Where possible, the present results are compared against those from earlier B-spline R-matrix [O.

Electron-impact excitation of the ( 5s25p ) P1/22→Hamilton1, Zatsarinny2, Bartschat3 et al. 2020Phys. Rev. ASelf Cite5090View full textAdd to dashboardCite

“…2. Indeed, this behavior appears to be ubiquitous in electron-metal vapor scattering, for both the elastic and discrete inelastic channels, with a few examples supporting that assertion being bismuth [40], zinc [39], sodium [48], and magnesium [49]. The oscillatory nature of any differential cross section arises from the interference, both constructive and destructive, between the various partial waves that describe the collisional behavior.…”

“…In the current experiments, we utilized an electronscattering apparatus that has already been described in some detail previously [39,40], so that only a brief description of its features and operational performance need be given here. It consists of an oven for the production of the indium beam, a monochromator for producing the incident electron beam and an analyzer, consisting of electrostatic optical elements and a single channeltron for electron detection, to energy analyze the scattered electrons.…”

Joint theoretical and experimental study on elastic electron scattering from bismuth

“…It is understood in the electron-scattering community that the ground-breaking electron-metal vapor measurements, made at the Jet Propulsion Laboratory (JPL) from the early 1970s-1980s, for both elastic and discrete inelastic processes, have not stood the test of time and are inaccurate. There are many examples confirming that assertion, including for sodium [20], magnesium [21,22], and zinc [23]. Thus a further rationale behind this submission was to check that scenario explicitly for bismuth [19] and, just as importantly, to extend the available experimental elastic cross section data base beyond the single 40-eV measurement.…”

“…The apparatus and measurement procedures for this study are very similar to those we employed in our recent work with zinc [23], and so only a brief précis of the features specific to bismuth need to be addressed here. A conventional crossed-beam electron spectrometer and atomic-beam source was employed, with both the electron beam and atomic beam being highly stable (to better than ∼2% in each case) throughout our experiments.…”

“…IV. After appropriate background subtraction, two approaches, which gave self-consistent results for the derived DCSs at each E 0 and θ e , were employed to set the absolute scale of our data [23]. In the first normalization approach, for a given E 0 , the elastic angular distributions were determined by measuring the scattered elastic count rate (i.e., at 0 eV energy loss) at each chosen scattered electron angle θ e , and then correcting those data for the forward angle scattering effect using the approach of Brinkman and Tramar [26].…”