Title: nuclear quadrupole resonance spectroscopy
Long Title: IUPAC Gold Book - nuclear quadrupole resonance spectroscopy
DOI: 10.1351/goldbook.08388
Status: current

Definition
Measurement method of nuclear magnetic resonance spectroscopy where splitting of the nuclear spin states is determined by the electrostatic interaction of the nuclear charge density with the external electric potential of the surrounding electron cloud.

Note
Unlike NMR, NQR transitions of nuclei can be detected in the absence of a magnetic field.

Related Term
- nuclear magnetic resonance spectroscopy: https://goldbook.iupac.org//terms/view/08218

Source
- PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 699 (https://doi.org/10.1515/pac-2019-0203)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/08388/html
- json: https://goldbook.iupac.org/terms/view/08388/json
- xml: https://goldbook.iupac.org/terms/view/08388/xml

Citation: Citation: 'nuclear quadrupole resonance spectroscopy' 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.08388
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Accessed: 2026-08-04T04:41:02+00:00