High precision measurement of the 6He half-life
Résumé
The half-life of 6He has been measured using a low-energy radioactive beam implanted in an YAlO3 Ce-doped inorganic scintillator and recording decay events in a 4π geometry. Events were time-stamped with a digital data acquisition system enabling a reliable control of dead-time effects and detector gain variations. The result, T1/2 = (807.25 ± 0.16stat ± 0.11sys) ms, provides the most precise value obtained so far and is consistent with the only previous measurement having a precision smaller than 0.1%. This resolves the long-standing discrepancy previously observed between two sets of measurements.
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