Effective cadmium cut-off energy

{
  "id": "MLC-T-CHM-003582",
  "term": "Effective cadmium cut-off energy",
  "field": "Chemistry",
  "definition": "For a given irradiation setup, the neutron energy at which an ideal step-function absorber, opaque below and transparent above that energy, would give the same detector response as the real cadmium cover. It is a convention for separating thermal from epithermal neutrons in activation analysis and depends on cover thickness and geometry. For a cadmium cover about 1 mm thick the value is roughly 0.55 eV.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "radiation detector"
  ],
  "references": [
    "Orange Book, 2nd ed., p. 221 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1982, 54, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1540 (https://doi.org/10.1351/pac198254081533)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/effective-cadmium-cut-off-energy/"
}