Beta decay half-lives of neutron rich Ti–Co isotopes around N=40 Original Research Article

The neutron-rich View the MathML sourceTi, View the MathML sourceV, View the MathML sourceCr, View the MathML sourceMn, View the MathML sourceFe, View the MathML sourceCo have been produced at GANIL via interactions of a 60.4 MeV/u 86Kr34+ with a 58Ni target. They have been separated by the doubly achromatic spectrometer LISE3. Beta-decay half-lives have been determined for all produced nuclei, and subsequent γ-rays have been observed for the most efficiently produced nuclei. The measured half-lives of vanadium and chromium isotopes are compared to QRPA calculations using ground states deformations from the FRDM or ETFSI models. In an astrophysical context, the short half-lives of 58Ti and 64Cr indicate that these nuclei are potential r-process progenitors, after β-decay, of 58Fe and 64Ni in certain inclusions of meteorites.