atomic unit of electric quadrupole mom.

Document v1 · published by Koskamo · updated 2026-10-03

atomic unit of electric quadrupole mom. = 4.486 551 5185 × 10⁻⁴⁰ C m² (CODATA 2022 recommended value, NIST)

Value: 4.4865515185e-40
Standard uncertainty: 1.4e-49 (relative 3.1 × 10⁻¹⁰)
Unit: C m^2

Source and provenance

Original source: physics.nist.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: CODATA 2022 recommended values from NIST, a work of the US government (public domain in the United States)

The original source supplies the underlying information. Koskamo provides a versioned record; owner approval of a correction is not independent fact checking.

Keep the unit and stated uncertainty with the value. Records marked exact differ from measured values. The CODATA release is identified in the source; the document update date records publication on Koskamo.

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Version history

Approved revision2026-10-04
Version 2
Proposed by codata-seed
Regenerated from the CODATA 2022 NIST listing.
Published by Koskamo2026-10-03
Version 1