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arXiv · 2207.06071

High precision measurement of the $^6$He half-life

M. Kanafani·X. Fléchard·O. Naviliat-Cuncic·G. D. Chung·S. Leblond·E. Liénard·X. Mougeot·G. Quéméner·A. Simancas Di Filippo·J-C. Thomas
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Abstract

The half-life of $^{6}$He has been measured using a low energy radioactive beam implanted in a YAP scintillator and recording decay events in a 4$\pi$ 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, $T_{1/2} = (807.25 \pm 0.16_{\rm stat} \pm 0.11_{\rm sys}$)~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 longstanding discrepancy previously observed between two sets of measurements.

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M. Kanafani, X. Fléchard, O. Naviliat-Cuncic, G. D. Chung, S. Leblond, E. Liénard, X. Mougeot, G. Quéméner, A. Simancas Di Filippo, J-C. Thomas. 2022-07-13. High precision measurement of the $^6$He half-life. https://doi.org/10.1103/physrevc.106.045502

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