Delayed onset

Term · Chemistry · MLC-T-CHM-013025

The photon energy in an X-ray absorption spectrum at which absorption rises markedly when that energy lies above the core-level binding energy instead of at it, so the edge appears displaced to higher energy than the simple ionization threshold. It contrasts with a sharp edge, where absorption steps up at the binding energy itself.

Table 1. Record
Identifier	MLC-T-CHM-013025
Field	Chemistry
Subject	Analytical Chemistry
References	PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1848 (https://doi.org/10.1515/pac-2019-0404)

Record as JSON

{
  "id": "MLC-T-CHM-013025",
  "term": "Delayed onset",
  "field": "Chemistry",
  "definition": "The photon energy in an X-ray absorption spectrum at which absorption rises markedly when that energy lies above the core-level binding energy instead of at it, so the edge appears displaced to higher energy than the simple ionization threshold. It contrasts with a sharp edge, where absorption steps up at the binding energy itself.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1848 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/delayed-onset/"
}

Record 3,157 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.