Lifetimes of low-lying excited states of the neutron-rich Ar44,46 nuclei, populated via multinucleon transfer reactions, are measured by means of the differential recoil distance Doppler shift method. The extracted electromagnetic transition probabilities are compared with previous intermediate-energy Coulomb-excitation measurements and with large-scale shell-model calculations. The increase in the deduced B(E2;2+→0+) transition probability from Ar44 to the closed-shell nucleus Ar46 contradicts the earlier results of Coulomb-excitation experiments. Shell-model calculations using different effective interactions agree with the new measured values.
ASJC Scopus subject areas
- Nuclear and High Energy Physics