[en] The cross sections for the characteristic γ-rays of the residual nuclei following ⁶Li + ¹⁶O and ⁷Li + ¹⁶O reactions have been measured at low energies with HPGe detectors. The fusion cross sections obtained from these γ-ray cross sections for both the systems are found to be in excellent agreement with the total reaction cross sections and this indicates that there is no inhibition of fusion cross sections for these systems at low energies, which is in contradiction to the results obtained from the measurement of evaporation residues and light particles. These cross sections also show good agreement with the IWBC (Incoming Wave Boundary Condition) model and the 1-D BPM (One-Dimensional Barrier Penetration Model) calculations. The critical angular momenta (l_cr) deduced from the fusion cross sections are also found to have an energy dependence similar to other Li-induced reactions

[en] The dipole response of stable and unstable neutron-rich oxygen nuclei of masses A=17 to A=22 has been investigated experimentally utilizing electromagnetic excitation in heavy-ion collisions at beam energies about 600 MeV/nucleon . A kinematically complete measurement of the neutron decay channel in inelastic scattering of the secondary beam projectiles from a Pb target was performed. Differential electromagnetic excitation cross sections dσ/dE were derived up to 30MeV excitation energy. In contrast to stable nuclei, the deduced dipole strength distribution appears to be strongly fragmented and systematically exhibits a considerable fraction of low-lying strength

[en] Fragmentation of ²⁰⁸Pb has been used to populate very neutron-rich nuclei in the transitional region with A∼190-200. The isomeric states of these nuclei have been studied using γ-ray spectroscopy. After fragmentation, the nuclei of interest were separated, identified and finally implanted in an aluminum plate surrounded by a γ-spectroscopy set-up. This experiment has proven the ability of such a technique to populate medium to high spin states and γ-ray transitions have been observed for the first time in a number of neutron-rich nuclei in this region, including ¹⁹⁰W, ¹⁹⁵Os, ¹⁹⁷Ir, ²⁰²Pt

[en] In the present work the high spin states of ¹³⁷Ce was populated via ¹³⁰Te(¹²C, 5n) reaction using 65 MeV ¹²C beam from the 15UD pelletron and studied

[en] In this communication the measurement of level lifetimes in the yrast band of ¹⁰⁸Cd after the first neutron alignment is reported

[en] A concentration of dipole strength at energies below the giant dipole resonance was observed in neutron-rich nuclei around ¹³²Sn in an experiment using the FRS-LAND setup. This so-called 'pygmy' dipole strength can be related to the parameters of the symmetry energy and to the neutron skin thickness on the grounds of a relativistic quasiparticle random-phase approximation. Using this ansatz and the experimental findings for ¹³⁰Sn and ¹³²Sn, we derive a value of the symmetry energy pressure of p-bar₀ = 2.2±0.5 MeV/fm³. Neutron skin thicknesses of R_n-R_p 0.23±0.03 fm and 0.24±0.03 fm for ¹³⁰Sn and ¹³²Sn, respectively, have been determined. Preliminary results on ⁶⁸Ni from a similar experiment using an improved setup indicate an enhanced cross section at low energies, while the results for ⁵⁸Ni are in accordance with results from photoabsorption measurements.

[en] In this communication an abrupt change from principal to tilted axis rotation in ¹⁰⁹Ag is reported

[en] The appearance of the pygmy-dipole-resonance is a recently observed phenomenon that can be related to neutron-matter properties. Its study can be a tool to determine the nuclear symmetry-energy parameters and thus can contribute constraining neutron star models. We present the (γ,n) cross sections for different Ni isotopes obtained from a measurement in inverse kinematics at about 500 MeV/u in the LAND reaction setup at GSI. The question of the disentanglement of the Coulomb and nuclear contributions is addressed.

[en] The present work was undertaken with the aim to study the higher spin states of a few nuclei in the A ∼40 region for which heavy ion data are scanty

[en] The high spin states in the ¹³⁹Ce nucleus have been studied by in-beam γ-spectroscopic techniques using the reaction ¹³⁰Te(¹²C,3n)¹³⁹Ce at E_beam=65 MeV. A gamma detector array, consisting of five Compton-suppressed Clover detectors was used for coincidence measurements. 15 new levels have been proposed and 28 new γ transitions have been assigned to ¹³⁹Ce on the basis of γγ coincidence data. The level scheme of ¹³⁹Ce has been extended above the known 70 ns (19/2)^- isomer up to ∼6.1 MeV in excitation energy and (35/2)(ℎ/2π) in spin. The spin-parity assignments for most of the newly proposed levels have been made using the deduced Directional Correlation from Oriented states of nuclei (DCO ratio) and the Polarization Directional Correlation from Oriented states (PDCO ratio) for the de-exciting transitions. The observed level structure has been compared with a large basis shell model calculation and also with the predictions from cranked Nilsson-Strutinsky (CNS) calculations. A general consistency has been observed between these two different theoretical approaches.