TY  - JOUR
AU  - Orce, J. N. et al
AU  - Rubio, B.
PY  - 2016
DA  - 2016//
TI  - Search for two-phonon octupole excitations in Gd-146
T2  - Eur. Phys. J. A
JO  - European Physical Journal A
SP  - 166
EP  - 7pp
VL  - 52
IS  - 6
PB  - Springer
AB  - The low-spin structure of the nearly spherical nucleus Gd-146 was studied using the Sm-144(He-4, 2n) fusion-evaporation reaction. High-statistics gamma-gamma coincidence measurements were performed at iThemba LABS with 7x10(9) gamma-gamma coincidence events recorded. Gated gamma-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 I-gamma = 4.7(10) for the 6(2)(+) -> 3(1)(-) 1905.1 keV gamma 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.
SN  - 1434-6001
UR  - https://doi.org/10.1140/epja/i2016-16166-2
DO  - 10.1140/epja/i2016-16166-2
LA  - English
N1  - WOS:000378999800002
ID  - Orce+Rubio2016
ER  -