Title: perturbed angular correlation spectrometry
Long Title: IUPAC Gold Book - perturbed angular correlation spectrometry
DOI: 10.1351/goldbook.08749
Status: current

Definition
Measurement method of gamma-ray spectrometry in which coincidence counting is used for the measurement of parameters describing hyperfine interactions, with internal or external electrical or magnetic field gradients, of the spin of an intermediate level between two gamma-ray transitions in cascade emitted in the decay of a radionuclide.

Notes
1) Perturbed angular correlation spectrometry can be performed both in a time-differential (TDPAC) and in a time-integrated (TIPAC) mode of measurement.
2) The parameters describing hyperfine interactions provide information on the chemical atomic environment of the decaying nucleus.

Related Term
- gamma-ray spectrometry: https://goldbook.iupac.org//terms/view/08728

Source
- PAC, 2021, 93, 69. 'Vocabulary of radioanalytical methods (IUPAC Recommendations 2020)' on page 91 (https://doi.org/10.1515/pac-2019-0302)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08749/html
- json: https://goldbook.iupac.org/terms/view/08749/json
- xml: https://goldbook.iupac.org/terms/view/08749/xml

Citation: Citation: 'perturbed angular correlation spectrometry' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08749
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Accessed: 2026-05-18T03:51:11+00:00