Precise half-life measurements for 38Ca and 39Ca
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en
Article de revue
Este ítem está publicado en
European Physical Journal A. 2010-06, vol. 44, p. 363-372
EDP Sciences
Resumen en inglés
The half-lives of 38Ca and 39Ca have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. 38Ca is one of the T z = - 1 , 0+ ...Leer más >
The half-lives of 38Ca and 39Ca have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. 38Ca is one of the T z = - 1 , 0+ 0+ -emitting nuclides used to determine the vector coupling constant of the weak interaction and the Vud 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 39Ca , a half-life of T 1/2 = 860.7(10) ms is obtained, a result in agreement with the average value from the literature.< Leer menos
Palabras clave
POSITRON DECAYS
NUCLEI
SPECTROSCOPY
LIVES
IONS
Orígen
Importado de HalCentros de investigación