Take-off angle

{
  "id": "MLC-T-CHM-013639",
  "term": "Take-off angle",
  "field": "Chemistry",
  "definition": "The angle at which a particle leaves a sample surface, measured from the surface plane, and so complementary to the emission angle, which is measured from the surface normal. In angle-resolved XPS, a small take-off angle means near-grazing emission, a shorter path through the solid and so greater surface sensitivity. The information depth is roughly proportional to the sine of the take-off angle.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "angle of emission"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1817 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/take-off-angle/"
}