|
|||||
|
|
Precise half-life measurements for 38Ca and 39Ca |
|
| Authors: | B. Blank A. Bey I. Matea J. Souin L. Audirac M. J. G. Borge G. Canchel P. Delahaye F. Delalee C. -E. Demonchy R. Domínguez-Reyes L. M. Fraile J. Giovinazzo Tran Trong Hui J. Huikari D. Lunney F. Munoz J. -L. Pedroza C. Plaisir L. Serani S. Sturm O. Tengblad F. Wenander |
| Affiliation: | 1. Centre d’études nucléaires de Bordeaux Gradignan, Université Bordeaux 1 - UMR 5797 CNRS/IN2P3, Chemin du Solarium, BP 120, 33175, Gradignan Cedex, France 2. Instituto de Estructura de la Materia, CSIC, Serrano 113bis, 28006, Madrid, Spain 3. CERN, CH-1211, Geneva 23, Switzerland 4. Grupo de Física Nuclear, Facultad CC. Físicas, Universidad Complutense, E-28040, Madrid, Spain 5. Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, (CNRS/IN2P3) Batiment 108, Université de Paris Sud, F-91405, Orsay, France 6. Department of Physics, Johannes Gutenberg University, D-55099, Mainz, Germany |
| Abstract: | 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+ $ rightarrow$ 0+ $ beta$ -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. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |