TY  - JOUR
AU  - AGATA Collaboration (Hadynska-Klek, K. et al
AU  - Gadea, A.
PY  - 2018
DA  - 2018//
TI  - Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 024326
EP  - 20pp
VL  - 97
IS  - 2
PB  - Amer Physical Soc
AB  - ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.
SN  - 2469-9985
UR  - https://doi.org/10.1103/PhysRevC.97.024326
DO  - 10.1103/PhysRevC.97.024326
LA  - English
N1  - WOS:000425604200003
ID  - AGATACollaborationHadynska-Klek+Gadea2018
ER  -