Energy of the superallowed positron decay of sup 10 C

The threshold energy for the {sup 10}B({ital p},{ital n}){sup 10}C reaction and the energy of the 720 keV gamma ray which follows the decay of {sup 10}C have been measured to be 4876.91{plus minus}0.10 keV and 718.353{plus minus}0.011 keV, respectively. This has enabled the energy of the superallowed positron decay of {sup 10}C to be determined to be 885.72{plus minus}0.09 keV, which is a necessary step in the deduction of an accurate {ital ft} value.