학술논문
High-precision half-life determination of $^{14}$O via direct $\beta$ counting
Document Type
Working Paper
Author
Sharma, S.; Grinyer, G. F.; Ball, G. C.; Leslie, J. R.; Svensson, C. E.; Ali, F. A.; Andreoiu, C.; Bernier, N.; Bhattacharjee, S. S.; Bildstein, V.; Burbadge, C.; Caballero-Folch, R.; Coleman, R.; Varela, A. Diaz; Dunlop, M. R.; Dunlop, R.; Garnsworthy, A. B.; Fuakye, E. Gyabeng; Huber, G. M.; Jigmeddorj, B.; Kapoor, K.; Laffoley, A. T.; Leach, K. G.; Long, J.; MacLean, A. D.; Natzke, C. R.; Olaizola, B.; Radich, A. J.; Saei, N.; Smallcombe, J. T.; Talebitaher, A.; Whitmore, K.; Zidar, T.
Source
Subject
Language
Abstract
The half-life of the superallowed Fermi $\beta^+$ emitter $^{14}$O was determined to high precision via a direct $\beta$ counting experiment performed at the Isotope Separator and Accelerator (ISAC) facility at TRIUMF. The result, $T_{1/2}$($^{14}$O) = 70619.2(76) ms, is consistent with, but is more precise than, the world average obtained from 11 previous measurements. Combining the $^{14}$O half-life deduced in the present work with the previous most precise measurements of this quantity leads to a reduction in the overall uncertainty, by nearly a factor of 2. The new world average is $T_{1/2}$($^{14}$O) = 70619.6(63) ms with a reduced $\chi^2$ value of 0.87 obtained from 8 degrees of freedom.
Comment: 8 pages, 6 figures, accepted for publication in the European Physical Journal A
Comment: 8 pages, 6 figures, accepted for publication in the European Physical Journal A