High precision measurement of the Ne-19 beta-decay half-life using real-time digital acquisition

0484304 - ÚJF 2018 RIV US eng J - Journal Article
Fontbonne, C. - Ujic, P. - de Oliveira Santos, F. - Flechard, X. - Rotaru, F. - Achouri, N. L. - Girard Alcindor, V. - Bastin, B. - Boulay, F. - Briand, J. B. - Sanchez-Benitez, A. M. - Bouzomita, H. - Borcea, C. - Borcea, R. - Blank, B. - Cerniol, B. - Celikovic, I. - Delahaye, P. - Delaunay, F. - Etasse, D. - Fremont, G. - de France, G. - Fontbonne, J. M. - Grinyer, G. F. - Harang, J. - Hommet, J. - Jevremovic, A. - Lewitowicz, M. - Martel, I. - Mrázek, Jaromír - Parlog, M. - Poincheval, J. - Ramos, D. - Spitaels, C. - Stanoiu, M. - Thomas, J. C. - Toprek, D.
High precision measurement of the Ne-19 beta-decay half-life using real-time digital acquisition.
Physical Review C. Roč. 96, č. 6 (2017), č. článku 065501. ISSN 2469-9985. E-ISSN 2469-9993
R&D Projects: GA MŠMT LM2015076
Institutional support: RVO:61389005
Keywords : after-pulses * baseline fluctuations * half-lives nuclei
OECD category: Nuclear physics
Impact factor: 3.304, year: 2017

The half-life of Ne-19 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 Ne-19. It is found to be in agreement with two recent precise measurements and not consistent with the most recent one [L.J. Broussard et al., Phys. Rev. Lett. 112, 212301 (2014)] by 3.0 standard deviations. The full potential of the technique for nuclei with half-lives of a few seconds is discussed.
Permanent Link: http://hdl.handle.net/11104/0279437