Hyperfine coupling

{
  "id": "MLC-T-CHM-005513",
  "term": "Hyperfine coupling",
  "field": "Chemistry",
  "definition": "The interaction between the magnetic moment of an electron and the magnetic moment of an atomic nucleus, leading to a splitting of energy levels. This interaction is quantified by the hyperfine coupling constant, which is a measure of the strength of the interaction. It is a key parameter in electron paramagnetic resonance (EPR) spectroscopy for determining molecular structure.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "fermi",
    "chemical induction",
    "isotropic",
    "nucleus",
    "spin density"
  ],
  "references": [
    "PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1945 (https://doi.org/10.1351/pac199971101919)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/hyperfine-coupling/"
}