Opportunity to observe an M0 transition

Abstract

It seems that the best opportunity to observe a low-energy 0+ → 0- M0 transition would be in the most strongly octupole deformed nucleus 224Ac having the known 0- ground state and parity doublet bands with splittings of only ~7 keV. Based on the rigid rotor model fit to available experimental data a 0+ excited state at ~2 keV is suggested and possible mechanisms of the M0 transition to the ground state discussed.