Enhanced elastic cross section

{
  "id": "MLC-T-CHM-003936",
  "term": "Enhanced elastic cross section",
  "field": "Chemistry",
  "definition": "An elastic scattering cross section of an atom that exceeds the Rutherford value because the incident particle partly penetrates the target nucleus, so nuclear forces act in addition to the Coulomb repulsion. It is typical of light target nuclei probed with energetic ions in ion beam analysis, where tabulated measured cross sections replace the Rutherford formula. Near a narrow nuclear resonance it can rise far above the Rutherford value, as for 4He on 16O near 3.04 MeV.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Rutherford cross section"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1833 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/enhanced-elastic-cross-section/"
}