Using the Doppler-shift attenuation method to extract lifetimes in ²⁰Ne

In this investigation lifetimes in ²⁰Ne were determined using the Doppler-shift attenuation method. The experiment was performed at the Cologne FN-Tandem accelerator in October 2017 using a ¹⁶O(⁹Be,nα)²⁰Ne reaction with a 0.9 (mg)/(cm²) Be target on a 2.7 (mg)/(cm²) Mg backing at 4 beam energies between 30 and 38 MeV. For the line shape analysis an improved version of DESASTOP was used. A detailed discussion of the used analysis method as well as preliminary results will be presented and compared to the systematics of light nuclei. In the series of Ne isotopes it becomes apparent that for ²⁰Ne and ²²Ne the increase in B(E2; 2⁺→0⁺) strength, compared to more neutron rich Ne isotopes, cannot be reproduced by shell model calculations. Because of this discrepancy we were motivated to revisit this topic experimentally.