Joint theoretical and experimental study on elastic electron scattering from bismuth

Abstract

We report on experimental elastic differential and integral cross sections for electron scattering from bismuth. The energy range of those measurements is 10-100 eV, while the scattered electron angular range in the differential cross section data is 10 •-150 •. We also supplement our experimental results with theoretical data from our optical potential approach, in this case applying two different sets of scattering potentials to the problem. Good overall qualitative accord is typically observed between our measured and calculated results, particularly when allowance is made for the dimer contribution in the experimental atomic beam.

Electron-impact excitation of the (4d105s)S1/22→

“…3. 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 [22], zinc [21], indium [23], sodium [54], and magnesium [55]. The oscillatory nature of any differential cross section arises from the interference between the various partial waves that describe the collisional behavior.…”

“…1 for a typical example) were measured at each θ , before being analyzed. For many years we calibrated, often using a variety of resonance or Wignercusp features for the species in question (e.g., [21][22][23]), our incident electron beam energy. In all that time the correction to the value of E 0 read on the relevant voltage supply was never worse than ±0.1 eV.…”

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.…”

A Decade with VAMDC: Results and Ambitions

“…The interactions of electrons with atoms and molecules are presented as both differential and integral cross sections for processes such as elastic scattering, excitation and ionisation [113]. Since the previous review of VAMDC [3], a considerable volume of new collisional data on metal atom targets has been included from the published sources (e.g., for bismuth [114] or zinc [115]) and selected molecules (e.g., for methane [112] or nitrous oxide [32]). Curation and maintenance of electron collisional data is relevant in many research areas such as astrophysics [116], plasma [117], radiation damage [118] or in lighting applications [119].…”