Half-life and branching ratios for the $\beta$ decay of $^{38}$Ca

Bertram Blank (1) , J.C. Thomas (2) , P. Ascher (1) , L. Audirac (1) , A. Bacquias (1) , L. Caceres (2) , G. Canchel (1) , L. Daudin (1) , Francois de Oliveira Santos (2) , F. Didierjean (3) , M. Gerbaux (1) , J. Giovinazzo (1) , S. Grévy (1) , T. Kurtukian Nieto (1) , I. Matea (4) , F. Munoz (1) , M. Roche (1) , L. Serani (1) , N. Smirnova (1) , J. Souin (1)

1 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
2 GANIL - Grand Accélérateur National d'Ions Lourds
3 IPHC - Institut Pluridisciplinaire Hubert Curien
4 IPNO - Institut de Physique Nucléaire d'Orsay

In an experiment at the LISE3 facility of GANIL, we have studied with high precision the 0+ → 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 Ft 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.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Bertram Blank, J.C. Thomas, P. Ascher, L. Audirac, A. Bacquias, et al.. Half-life and branching ratios for the $\beta$ decay of $^{38}$Ca. European Physical Journal A, 2015, 51, pp.8-18. ⟨10.1140/epja/i2015-15008-1⟩. ⟨in2p3-01108941⟩