Fragmentation of exotic oxygen isotopes

Abrasion-ablation models and the empirical EPAX parametrization of projectile fragmentation are described. Their cross section predictions are compared to recent data of the fragmentation of secondary beams of neutron-rich, unstable 19,20,21O isotopes at beam energies near 600 MeV/nucleon as well as data for stable 17,18O beams

Coulomb fragmentation and Coulomb fission of relativistic heavy-ions and related nuclear structure aspects

The Coulomb excitation of 208Pb projectiles has been studied at an energy of 640 A MeV. Cross sections for the excitation of the two-phonon giant dipole resonance were measured for different targets, and show clear evidence for a two-step electromagnetic excitation mechanism. The experimental cross sections exceed those calculated in the harmonic oscillator approximation by a factor of 1.33 ± 0.16. The deduced 27-decay probability is consistent with the expectation in the harmonic limit. Finally, the excitation of the two-phonon giant dipole resonance in the deformed and fissile nucleus 238U is discussed

G-factors of high-spin states in 154Dy^{154}Dy

G-factors of excited states in Dy were measured up to high spins by a recoil-distance transient field technique. The results can be explained by i neutron alignment at the first band-crossing and confirm the alignment of protons in the spin 30 region

High-spin g-factors in 154Dy^{154}Dy

g-factors of excited states in Dy were measured up to high spins. A method that combines the recoil-distance technique with the use of the large transient magnetic fields was applied. The measurement was sensitive only to states which were populated ≈ 13.5 ps after the nuclear reaction. Hence the influence of unobserved quasi-continuum feeding states on the measured precession angles was minimized. The results are compared with calculated g-factors. They can be explained by the neutron i alignment in the positive- and negative-parity sequences at medium spins. They also confirm the predicted alignment of protons in the band termination region of spins I ≥ 30kh