High precision measurement of the 6He half-life
Résumé
The half-life of $^6$He has been measured using a low-energy radioactive beam implanted in an YAlO$_3$ 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, T$_{1/2}$ = (807.25 ± 0.16$_{stat}$ ± 0.11$_{sys}$) 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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