Experimental data on the variation of tritium nucleus beta decay constant caused by the interaction of the resulting beta-electron with orbital electrons and shell vacancies are reviewed for free atomic tritium and molecular tritium and used to obtain the half-life of atomic tritium (T_1/2)_a=(12.264±0.018) y, the half-life of the free triton (T_1/2)_t=(12.238±0.020) y, the axial-vector-to-vector weak-interaction coupling constant ratio (G_A/G_V)_t=-1.2646 ± 0.0035 for beta decay of the triton, and an independent estimate of the free neutron lifetime τ_n= (890.3 ± 3.9_stat ± 1.4_syst) s.

PACS: 14.20.Dh, 23.40.−s, 25.55.−e (all) DOI: 10.1070/PU2003v046n11ABEH001382 URL: https://ufn.ru/en/articles/2003/11/c/ 000220182500003 Citation: Akulov Yu A, Mamyrin B A "Helium-isotope mass-spectrometric method for studying tritium beta decay (idea, experiment, nuclear and molecular physics applications)" Phys. Usp. 46 1153–1162 (2003) BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks RT Journal T1 Helium-isotope mass-spectrometric method for studying tritium beta decay (idea, experiment, nuclear and molecular physics applications) A1 Akulov,Yu.A. A1 Mamyrin,B.A. PB Physics-Uspekhi PY 2003 FD 10 Nov, 2003 JF Physics-Uspekhi JO Phys. Usp. VO 46 IS 11 SP 1153-1162 DO 10.1070/PU2003v046n11ABEH001382 LK https://ufn.ru/en/articles/2003/11/c/ Оригинал: Акулов Ю А, Мамырин Б А «Изотопно-гелиевый масс-спектрометрический метод исследования бета-распада трития (идея, эксперимент, применение в ядерной и молекулярной физике)» УФН 173 1187–1197 (2003); DOI: 10.3367/UFNr.0173.200311c.1187