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Abstract
The g factor of the first excited 2 + state of 72 Zn has been measured using the Low Velocity Transient Field (LVTF) technique in combination with Coulomb excitation in inverse kinematics. The aim of the experiment was to test the viability of this method when applied to short-lived radioactive ISOL beams, in particular in comparison to the alternative High Velocity Transient Field (HVTF) technique using fragment beams. The result obtained forg(2 + ) in 72 Zn in the present experiment follows the trend observed for the lighter stables Zn isotopes.
Highlights
The neutron-proton interaction is responsible for changes in the single-particle energies which subsequently modify the sizes of the shell and sub-shell gaps
The 2+ g-factor in 72Zn was chosen because it has been measured before using the High Velocity Transient Field (HVTF) method at GANIL [12] allowing for a direct comparison between these two techniques
Using the target with the thick Gd layer the excited 72Zn ions are stopped in the target before the emission of the γ-rays of interest as it is usually done in stable beam Low Velocity Transient Field (LVTF) experiments
Summary
The neutron-proton interaction is responsible for changes in the single-particle energies which subsequently modify the sizes of the shell and sub-shell gaps. Studying nuclear structure along the Zn chain provides information about the influence of N = 40 in the vicinity of Z = 28, i.e. where a few valence particles can be expected to have largest contributions Due to the inherent use of very thick targets, severe problems due to the accumulation of activity in the target region are expected when applied to short-lived radioactive beams This technique only has been applied to radioactive beams in a few cases [5, 9, 10]. The 2+ g-factor in 72Zn was chosen because it has been measured before using the HVTF method at GANIL [12] allowing for a direct comparison between these two techniques
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