Coulomb excitation of the odd-A 67,69,71,73Cu isotopes with MiniBall and REX-ISOLDE

Collective properties of low-lying states in the neutron-rich 67,69,71,73Cu isotopes were investigated by Coulomb excitation with radioactive beams produced at ISOLDE and post-accelerated by REX-ISOLDE up to 2.99 MeV/A. Experimental B(E2; 1/2- -> 3/2-g.s.), B(E2;5/2- -> 3/2-g.s.) and B(E2;7/2- -> 3/2-g.s.) were determined in all four investigated isotopes. Results show that the low-lying level schemes of these nuclei are governed by three different configurations: the expected proton single-particle excitations, core-coupled states and a surprisingly low-lying collective mode.status: publishe

In-beam electron spectroscopy at HIE-ISOLDE

Letter of Intent to the ISOLDE and Neutron Time-of-Flight Experiments Committee for experiments with HIE-ISOLDE

Decay correlations in the seconds range with laser-ionized, mass-separated beams

The upgraded LISOL beta-decay detection setup, which was used for the measurement of the mass A=67 Fe–Co–Ni decay chain, is presented. A new decay correlation technique has been developed in order to characterize an isomeric 492 keV transition, observed in this decay chain. Correlating single b and c events and b-coincident c events with each other in the seconds range, allowed for the placement of this isomeric transition in 67Co. A new half-life for the 67Co ground state was determined. The technique and its possibilities and limitations are discussed.status: publishe

Measurement of the inelastic branch of the 14O(alphamp)17F reaction: Implications for explosinve burning in novae and x-ray bursters

A measurement of the inelastic component of the key astrophysical resonance in the 14O(alpha,p)17F reaction for burning and breakout from hot carbon-nitrogen-oxygen (CNO) cycles is reported. The inelastic component is found to be comparable to the ground-state branch and will enhance the 14O(alpha,p)17F reaction rate. The current results for the reaction rate confirm that the 14O(alpha,p)17F reaction is unlikely to contribute substantially to burning and breakout from the CNO cycles under novae conditions. The reaction can, however, contribute strongly to the breakout from the hot CNO cycles under the more extreme conditions found in x-ray bursters.status: publishe

Structure of 191Pb from α- and β-decay spectroscopy

Complementary studies of 191Pb have been made in the β decay of 191Bi at LISOL (CRC) and in the α decay of 195Po at ISOLDE (CERN). Fine structures in the α decay of the low-spin and high-spin isomers of 195Po have been fully resolved. Identification of the parent state is made possible via isomer selection based on narrow-band laser frequency scanning. The α-particle and γ -ray energies have been determined with greater precision. New α-particle and γ -ray energies are identified. Branching ratios in the decay of 195Po and 191Pb have been examined.status: publishe