Author/Authors :
A. Kellerbauer، نويسنده , , G. Audi، نويسنده , , D. Beck، نويسنده , , K. Blaum، نويسنده , , G. Bollen، نويسنده , , P. Delahaye، نويسنده , , F. Herfurth، نويسنده , , H.-J. Kluge، نويسنده , , V. Kolhinen، نويسنده , , M. Mukherjee، نويسنده , , D. Rodr?guez، نويسنده , , S. Schwarz، نويسنده ,
Abstract :
At the highest possible precisions, atomic-mass measurements can be used to perform fundamental studies. Examples for such studies are a check of the conserved-vector-current (CVC) hypothesis and the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, both postulates of the Standard Model. The comparative half-lives Ft of superallowed β decays constitute the nuclear-physics access to these tests. The Q value of the β decay of 74Rb, one of the three experimentally accessible parameters that enter into the Ft values, has been measured with the ISOLTRAP experiment at ISOLDE/CERN. The ultimate mass precision requirement and the way to achieve it are outlined.
