%0 Journal Article
%T Shape Changes in the Mirror Nuclei Kr-70 and Se-70
%A Wimmer, K. et al
%A Algora, A.
%A Rubio, B.
%J Physical Review Letters
%D 2021
%V 126
%N 7
%I Amer Physical Soc
%@ 0031-9007
%G English
%F Wimmer_etal2021
%O WOS:000619237200006
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4715), last updated on Thu, 04 Mar 2021 08:09:56 +0000
%X We studied the proton-rich T-z = -1 nucleus Kr-70 through inelastic scattering at intermediate energies in order to extract the reduced transition probability, B(E2; 0+ -> 2+). Comparison with the other members of the A = 70 isospin triplet, Br-70 and Se-70, studied in the same experiment, shows a 3 sigma deviation from the expected linearity of the electromagnetic matrix elements as a function of T-z. At present, no established nuclear structure theory can describe this observed deviation quantitatively. This is the first violation of isospin symmetry at this level observed in the transition matrix elements. A heuristic approach may explain the anomaly by a shape change between the mirror nuclei Kr-70 and Se-70 contrary to the model predictions.
%R 10.1103/PhysRevLett.126.072501
%U https://arxiv.org/abs/2101.02363
%U https://doi.org/10.1103/PhysRevLett.126.072501
%P 072501-6pp