Abstract
The structure of neutron-rich light nuclei can be investigated by means of in-beam gamma spectroscopy using both stable and radioactive beams. Two such experiments have recently been performed at GANIL. (i) Secondary beams of neutron-rich Ge, Zn and Ni isotopes around N = 40 were produced from the fragmentation of primary 70Zn 86Kr beams, and analyzed by means of the LISE3 spectrometer. For the transitions between the 0+ ground state and the first 2+ state, B(E2) values have been extracted from Coulomb excitation cross-section measurement. Some of the obtained results related to the effectiveness of the N = 40 spherical sub-shell closure are discussed. (ii) In-beam γ-spectroscopy of neutron-rich nuclei around 32Mg produced by fragmentation of 36S have been performed recently. Gamma decay of relatively high-lying excited states have been measured in a large number of exotic light nuclei. New results obtained in a number of neutron-rich nuclei around N = 20 are presented.
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