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

0484304 - ÚJF 2018 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA MŠMT LM2015076
Institucionální podpora: RVO:61389005
Klíčová slova: after-pulses * baseline fluctuations * half-lives nuclei
Obor OECD: Nuclear physics
Impakt faktor: 3.304, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0279437