%0 Journal Article
%T Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA
%A AGATA Collaboration (Hadynska-Klek, K. et al
%A Gadea, A.
%J Physical Review C
%D 2018
%V 97
%N 2
%I Amer Physical Soc
%@ 2469-9985
%G English
%F AGATACollaborationHadynska-Klek+Gadea2018
%O WOS:000425604200003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3506), last updated on Wed, 14 Mar 2018 16:55:29 +0000
%X 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.
%R 10.1103/PhysRevC.97.024326
%U https://doi.org/10.1103/PhysRevC.97.024326
%P 024326-20pp