High precision measurement of the $^{19}$Ne $\beta$-decay half-life using real-time digital acquisition

Abstract : The half-life of Ne19 was measured using a real-time digital multiparametric acquisition system, providing an accurate time stamp and relevant information on the detector signals for each decay event. An exhaustive offline analysis of the data gave unique access to experimental effects potentially biasing the measurement. After establishing the influence factors impacting the measurement such as after-pulses, pile-up, gain, and baseline fluctuations, their effects were accurately estimated and the event selection optimized. The resulting half-life, 17.2569±0.0019(stat)±0.0009(syst) s, is the most precise up to now for Ne19. It is found to be in agreement with two recent precise measurements and not consistent with the most recent one [L. J. Broussard , Phys. Rev. Lett. 112, 212301 (2014)PRLTAO0031-900710.1103/PhysRevLett.112.212301] by 3.0 standard deviations. The full potential of the technique for nuclei with half-lives of a few seconds is discussed.
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Soumis le : jeudi 21 décembre 2017 - 00:45:23
Dernière modification le : jeudi 17 janvier 2019 - 01:16:34

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C. Fontbonne, P. Ujić, F. De Oliveira Santos, X. Fléchard, F. Rotaru, et al.. High precision measurement of the $^{19}$Ne $\beta$-decay half-life using real-time digital acquisition. Phys.Rev.C, 2017, 96 (6), pp.065501. 〈10.1103/PhysRevC.96.065501〉. 〈hal-01669781〉



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