Article Dans Une Revue Physical Review C Année : 2015

High-precision half-life measurement for the isospin T = 1/2 mirror $\beta^+$ decay of $^{21}$Na

Résumé

The half-life of the isospin T = 1/2 mirror $\beta^+$ decay of 21Na was measured at the GANIL- SPIRAL radioactive ion beam facility to be T1=2 = 22.422 (10) s, a result that is more than a factor of 5 times more precise than the previous world average, with a resulting ft value that is now two times more precise. The precision of this new result implies that the half-life is no longer the dominant source of uncertainty in the Ft value used in the calculation of Vud from mirror decays to test the conserved vector current hypothesis of the Standard Model. The value of Vud deduced from mirror decays using the new half-life result is now in better agreement with the Vud derived from T = 1 superallowed 0+ to 0+ transitions.
Fichier principal
Vignette du fichier
Grinyer_21Nahalflife_PRC.pdf (308.63 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

in2p3-01130237 , version 1 (11-03-2015)

Identifiants

Citer

J. Grinyer, G.F. Grinyer, M. Babo, H. Bouzomita, P. Chauveau, et al.. High-precision half-life measurement for the isospin T = 1/2 mirror $\beta^+$ decay of $^{21}$Na. Physical Review C, 2015, 91, pp.032501(R). ⟨10.1103/PhysRevC.91.032501⟩. ⟨in2p3-01130237⟩
119 Consultations
64 Téléchargements

Altmetric

Partager

More