Branching ratio of the super-allowed beta decay of 10C

In an experiment performed at the ISOLDE facility of CERN, the super-allowed $$\beta $$-decay branching ratio of $$^{10}$$C was determined with a high-precision single-crystal germanium detector. In order to evaluate the contribution of the pile-up of two 511 keV $$\gamma $$ quanta to one of the $$\gamma $$-ray peaks of interest at 1021.7 keV, data were not only taken with $$^{10}$$C, but also with a $$^{19}$$Ne beam. The final result for the super-allowed decay branch is 1.4638(50)%, in agreement with the average from literature.