[en] The neutron-rich nuclei ₂₁^57,58Sc, ₂₂^58-60Ti, ₂₂^58-60Ti, ₂₃^60-62V, ₂₄^64-66Cr, ₂₅^64-68Mn, ₂₆^67-70Fe and ₂₇^69-71Co have been produced at Ganil via interactions of a 61.8 A.MeV ⁷⁶Ge beam with a ⁵⁸Ni target. Beta-decay studies have been achieved, bringing new half-lives and a better nuclear structure knowledge in this region. These results could help for understanding the overabundances of the neutron-rich stable ⁵⁸Fe, ⁶⁴Ni in certain inclusions of meteorites

[en] The neutron-rich nuclei ₂₁^57,58Sc, ₂₂^58-60Ti, ₂₃^60-63V, ₂₄^62-66Cr, ₂₅^64-68Mn, ₂₆^67-70Fe and ₂₇^69-71Co have been produced at Ganil via interactions of a 61.8 A.MeV ⁷⁶Ge beam with a ⁵⁸Ni target. Beta-decay studies have been achieved, bringing new half-lives and a better nuclear structure knowledge in this region. These results could help for understanding the over-abundances of the neutron-rich stable ⁵⁸Fe, ⁶⁴Ni in certain inclusions of meteorites. (orig.)

[en] The neutron-rich nuclei^57,58₂₁Sc,^58-60₂₂Ti,^60-63₂₃V,^62-66₂₄Cr have been produced at Ganil via interactions of a 61.8A MeV ⁷⁶Ge beam with a ⁵⁸Ni target. Beta-decay studies have been performed using combined β- and γ-ray spectroscopy. Half-lives have been determined and β-decay schemes are proposed for ⁵⁸Ti, ⁶¹V and ⁶²Cr. From these studies, new hints for the existence of β-decaying isomers in ⁶⁰V and in ⁶²Mn are provided. These results are compared to shell model calculations. The role of the πf_7/2- νf_5/2 proton-neutron interaction is examined through its influence on the lifetime values. (orig.)

[en] The neutron-rich nuclei ₂₃^60-63V have been produced at GANIL via interactions of a 61.8A.MeV ⁷⁶Ge beam with a ⁵⁸Ni target. Beta-decay to ₂₄^60-63Cr has been investigated using combined β- and γ-ray spectroscopy. Half-lives of the ^60-63V nuclei have been determined, and the existence of a beta-decay isomer in the ⁶⁰V nucleus is strongly supported. The observation of low-energy 2⁺ states in ⁶⁰Cr (646keV) and ⁶²Cr (446keV) suggests that these isotopes are strongly deformed with β₂ ∝0.3. This is confirmed by shell model calculations which show the dominant influence of the intruder g and d orbitals to obtain low 2⁺ energies in the neutron-rich Cr isotopes. (orig.)