Rabi and colleagues: a new method of measuring nuclear magnetic moment

What changed

Introduced molecular-beam RF resonance to measure nuclear magnetic moments.

Scientific scope

The record is the exact four-author 1938 Physical Review letter. It reports a molecular-beam resonance method, not later bulk NMR, MRI or every subsequent magnetic-resonance technique, and attribution is limited to the paper byline.

Evidence

The linked sources identify this contribution and its scope. WRS has not independently reconstructed the scientific claims. The record is the exact four-author 1938 Physical Review letter. It reports a molecular-beam resonance method, not later bulk NMR, MRI or every subsequent magnetic-resonance technique, and attribution is limited to the paper byline.

Contributors

• Isidor I. Rabi · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• J. R. Zacharias · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Sidney Millman · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.
• Polykarp Kusch · SCIENCE: Named source author of the scoped work; individual effort shares are not measured.

• APS page for nuclear magnetic-moment method
• University-hosted full text of Rabi 1938 letter

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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