Carbon (Z=6)
9C 11C 12C 13C 14C 15C 17C

Recommended electric quadrupole moments
Isotope Energy [keV] t1/2 Spin/Parity Q [b] Method Recommended Tables
12C 4438 45 fs 2+ +0.06(3) CER INDC(NDS)-0833


Compiled magnetic dipole and electric quadrupole moments from published articles
Isotope Energy [keV] t1/2 Spin/Parity μ [nm] Q [b] Ref. Std Method NSR keyword doi
12C 4438. 10.8×10-3 eV 2+ +0.06(3) CER 1983VE01
2013STZZ
10.1016/0370-2693(83)91160-7

Recommended magnetic moments are for the bare nucleus with published results corrected consistently for diamagnetism (including error estimate).
  Where appropriate published results are also adjusted to the most recent adopted half-life for the state.
  Recommended quadrupole moments are adjusted using the best electric field gradient calculation for the system concerned.
  For details see the Reports referenced.

In this listing published results are given without adjustment or correction.