Geometric attenuation

{
  "id": "MLC-T-CHM-004852",
  "term": "Geometric attenuation",
  "field": "Chemistry",
  "definition": "The reduction in the intensity of radiation as it spreads out from a source, due to the inverse square law. This effect is purely a consequence of the increasing area over which the radiation is distributed, not due to absorption or scattering by a medium. For a point source, the intensity decreases proportionally to the square of the distance from the source.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "radiation"
  ],
  "references": [
    "PAC, 1982, 54, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1543 (https://doi.org/10.1351/pac198254081533)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/geometric-attenuation/"
}