High spin spectroscopy in ~(219)Ra: Search for the lower mass boundary of the region of statically octupole-deformed nuclei

摘要

We report the results of a study of rotational bands in ~(219)Ra via the ~(208)Pb(~(14)C,3n) reaction to look for evidence that this nucleus is statically octupole deformed. We add 19 γ rays not previously observed to the level scheme and extend the two most strongly populated alternating parity bands to J = 51/2 and 45/2. The magnitude of the energy splitting between the spin-parity doublets in the two bands appears to exclude the possibility that ~(219)Ra has a static octupole deformation.