14C

Measurement of the 14C abundance in a low-background liquid scintillator Physics Letters B  Volume 422, Issues 1–4, 12 March 1998, Pages 349-358 doi:10.1016/S0370-2693(97)01565-7   [local copy] Abstract The 14C/12C ratio in 4.8 m3 of high-purity liquid scintillator was measured at (1.94±0.09)×10−18, the lowest 14C