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HK: Fachverband Hadronen und Kerne
HK 37: Nuclear Structure and Dynamics II
HK 37.4: Vortrag
Dienstag, 17. März 2009, 17:45–18:00, H-ZO 50
Sub-barrier Coulomb excitation of 104,102,100Cd — Andreas Ekström, Joakim Cederkall, •Douglas DiJulio, and Claes Fahlander — Physics Department, Lund University, Sweden
Sub-barrier Coulomb excitation experiments in inverse kinematics have been carried out to measure the reduced transition probabilities from the first excited 21+ state to the 0+ ground state in the neutron deficient 104,102,100Cd isotopes at the REX-ISOLDE facility. Radioactive ion beams, containing either of the isotopes 104,102,100Cd at an energy of about 2.9 MeV per nucleon, were used during the experiments. In addition the static quadrupole moment for the 21+ state has been measured using different targets. De-excitation γ-rays were detected with the highly segmented Ge-array MINIBALL. A Double Sided Silicon Strip Detector (DSSSD) was used to detect the recoils and ejectiles. By combining the measurements from the different targets with results from previous lifetime measurements, new values for the B(E2) and the Q(21+) values can be deduced. The Cd isotopes are only two proton-holes away from the proton shell closure at 100Sn. The measurements are directed towards a better understanding of shell evolution in this region. Preliminary results from the experiment will be presented and discussed.