Precise half-life measurement of the superallowed β+ emitter 10C

The half-life of C-10 has been measured to be 19.310(4) s, a result with 0.02% precision, which is a factor of three improvement over the best previous result. Since C-10 is the lightest superallowed 0(+)-> 0(+) beta(+) emitter, its ft value has the greatest weight in setting an upper limit on the possible presence of scalar currents.