Effective attenuation length

{
  "id": "MLC-T-CHM-003580",
  "term": "Effective attenuation length",
  "field": "Chemistry",
  "definition": "A parameter used in surface analysis techniques like X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) to describe the attenuation of an electron signal due to both inelastic and elastic scattering. It represents the distance over which the unscattered electron flux is reduced to 1/e of its initial value. This length depends on the electron's kinetic energy, the material, and the specific geometry of the experimental setup.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Auger spectroscopy",
    "elastic scattering cross section",
    "electron inelastic mean free path",
    "angle of emission"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1823 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/effective-attenuation-length/"
}