Secondary fluorescence

{
  "id": "MLC-T-CHM-010613",
  "term": "Secondary fluorescence",
  "field": "Chemistry",
  "definition": "The emission of characteristic X-rays by an atom that has been excited by absorbing X-rays from a neighboring, previously excited atom within the same sample. It occurs when the primary fluorescent radiation from one element has sufficient energy to ionize a core electron of a different element, leading to a cascade and subsequent emission. This phenomenon, also known as interelement enhancement, leads to an overestimation of the concentration of the secondarily fluorescing element in quantitative X-ray analysis.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "ionization",
    "radiation"
  ],
  "references": [
    "PAC, 1980, 52, 2541. 'Nomenclature, Symbols, Units and their Usage in Spectrochemical Analysis - IV X-Ray Emission Spectroscopy' on page 2547 (https://doi.org/10.1351/pac198052112541)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/secondary-fluorescence/"
}