Recoil-free fraction

{
  "id": "MLC-T-CHM-010016",
  "term": "Recoil-free fraction",
  "field": "Chemistry",
  "definition": "The proportion of gamma-ray emission or absorption events in Mössbauer spectroscopy that occur without a change in the vibrational energy of the crystal lattice. This fraction, also known as the f-factor, is a measure of the probability that the nucleus remains in its lattice site during the emission or absorption process. It is temperature-dependent and decreases with increasing temperature.",
  "subject": "Physical and Biophysical Chemistry",
  "references": [
    "PAC, 1976, 45, 211. 'Nomenclature and Conventions for Reporting Mössbauer Spectroscopic Data' on page 214 (https://doi.org/10.1351/pac197645030211)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/recoil-free-fraction/"
}