Positron lifetime spectrometry

{
  "id": "MLC-T-CHM-009298",
  "term": "Positron lifetime spectrometry",
  "field": "Chemistry",
  "definition": "A technique that measures the time interval between the birth of a positron and its annihilation with an electron in a material. The lifetime of the positron is sensitive to the electron density in its local environment, providing information about defects, free volumes, and phase transitions in solids and liquids. Lifetimes are typically in the picosecond to nanosecond range.",
  "synonyms": [
    "positron annihilation lifetime spectrometry (PALS)"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "positron annihilation analysis"
  ],
  "references": [
    "PAC, 2021, 93, 69. 'Vocabulary of radioanalytical methods (IUPAC Recommendations 2020)' on page 92 (https://doi.org/10.1515/pac-2019-0302)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/positron-lifetime-spectrometry/"
}