Half-life and branching ratios for the β decay of 38Ca
Abstract.In an experiment at the LISE3 facility of GANIL, we have studied with high precision the $0^{+}\rightarrow 0^{+}$$ \beta$ decay of 38Ca. The LISE3 facility allowed to produce close to pure samples of the nuclide of interest. We measured the half-life of this nucleus to be 443.63(35)ms, whereas the super-allowed branching ratio was determined to be 77.14(35)%. Both data are in nice agreement with previous high-precision measurements and thus improve the overall precision of the experimental inputs to determine the corrected $F t$ value for this nucleus. We also compare the experimental Gamow-Teller strength distribution with theoretical shell-model predictions. Finally, future opportunities at LISE3 are discussed.