Precise half-life measurements for $^{38}$Ca and $^{39}$Ca

The half-lives of Ca-38 and Ca-39 have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. Ca-38 is one of the T-z = -1, 0(+). 0(+) beta-emitting nuclides used to determine the vector coupling constant...

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Detalles Bibliográficos
Autores principales: Blank, B, Giovinazzo, J, Demonchy, C-E, Borge, M J G, Matea, I, Munoz, F, Huikari, J, Dominguez-Reyes, R, Plaisir, C, Sturm, S, Canchel, G, Delahaye, P, Audirac, L, Fraile, L M, Serani, L, Lunney, D, Pedroza, J-L, Bey, A, Souin, J, Hui, Tran Trong, Delalee, F, Tengblad, O, Wenander, F
Lenguaje:eng
Publicado: 2010
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1140/epja/i2010-10958-2
http://cds.cern.ch/record/1359354
Descripción
Sumario:The half-lives of Ca-38 and Ca-39 have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. Ca-38 is one of the T-z = -1, 0(+). 0(+) beta-emitting nuclides used to determine the vector coupling constant of the weak interaction and the V-ud quark-mixing matrix element. The result obtained, T-1/2 = 443.8(19) ms, is four times more precise than the average of previous measurements. For Ca-39, a half-life of T-1/2 = 860.7(10) ms is obtained, a result in agreement with the average value from the literature.

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