N. Boukharouba

Study of 0+ States in Deformed Nuclei

In recent 160Gd(p,t) reaction studies the existence of more than ten 0+ states in 158Gd below 3.0 MeV was revealed. We have examined 158Gd with the (n,n′γ) reaction at neutron energies up to 3.5 MeV to confirm the identification of these states and to determine their lifetimes through DSAM measurements. Gamma‐ray excitation function and angular distribution measurements have been performed and γ − γ coincidences have been measured with the KEGS array of detectors. Moderately strong decays are observed from some of these 0+ states.

Structural Ambiguities In 114Cd

Properties of low‐spin states in 114Cd have been studied through the (n,n′γ) reaction. Gamma‐ray angular distributions and excitation functions have been used to characterize the decays of the excited levels, and level lifetimes have been obtained with the Doppler‐shift attenuation method. Data have been compared with the theoretical calculations following the Interacting Boson Model. Multiphonon states have been explored on the basis of their decay scheme and collective nature of the transitions.

Mixed‐Symmetry States in 96Mo

Mixed‐symmetry states in 96Mo have been identified using the (n,n′γ) reaction. From the lifetime measured using the Doppler‐shift attenuation method and multipole mixing ratios, B(E2) and B(M1) values were determined. The 2ms+ state was found at 2095.77 keV with B(M1: 2ms+ → 21+) = 0.18μN2, while the 1ms+ strength lies primarily in states at 2794.45 and 3300.23 keV.

Study of 0+ excitations in 158Gd with the (n,n′γ) reaction

In recent 160Gd(p,t) reaction studies the existence of more than ten 0+ states in 158Gd below 3.0 MeV was revealed. We have examined 158Gd with the (n,n′γ) reaction at neutron energies up to 3.5 MeV to confirm the identification of these states and to determine their lifetimes through DSAM measurements. Gamma-ray excitation function and angular distribution measurements have been performed and γ-γ coincidences have been measured with the KEGS array of detectors. Moderately strong decays are observed from some of these 0+ states.