TY  - JOUR
AU  - Wimmer, K. et al
AU  - Algora, A.
AU  - Rubio, B.
PY  - 2021
DA  - 2021//
TI  - Shape Changes in the Mirror Nuclei Kr-70 and Se-70
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 072501
EP  - 6pp
VL  - 126
IS  - 7
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - https://arxiv.org/abs/2101.02363
UR  - https://doi.org/10.1103/PhysRevLett.126.072501
DO  - 10.1103/PhysRevLett.126.072501
LA  - English
N1  - WOS:000619237200006
ID  - Wimmer_etal2021
ER  -