The low-spin structure of the nearly spherical nucleus 146Gd was studied using the 144Sm(4He, 2n) fusion-evaporation reaction. High-statistics γ-γ coincidence measurements were performed at iThemba LABS with 7× 109γ-γ coincidence events recorded. Gated γ-ray energy spectra show evidence for the 6+ 2 → 3- 1 → 0+ 1 cascade of E3 transitions in agreement with recent findings by Caballero and co-workers, but with a smaller branching ratio of Iγ = 4.7(10) for the 6+ 2 → 3- 1 1905.1 keV γ ray. Although these findings may support octupole vibrations in spherical nuclei, sophisticated beyond mean-field calculations including angular-momentum projection are required to interpret in an appropriate way the available data due to the failure of the rotational model assumptions in this nucleus.
|Journal||European Physical Journal A|
|State||Published - Jun 1 2016|
ASJC Scopus subject areas
- Nuclear and High Energy Physics