تقرير
Shape changes in the mirror nuclei $^{70}$Kr and $^{70}$Se
| العنوان: | Shape changes in the mirror nuclei $^{70}$Kr and $^{70}$Se |
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| المؤلفون: | Wimmer, K., Korten, W., Doornenbal, P., Arici, T., Aguilera, P., Algora, A., Ando, T., Baba, H., Blank, B., Boso, A., Chen, S., Corsi, A., Davies, P., de Angelis, G., de France, G., Delaroche, J. -P., Doherty, D. T., Gerl, J., Gernhäuser, R., Girod, M., Jenkins, D., Koyama, S., Motobayashi, T., Nagamine, S., Niikura, M., Obertelli, A., Libert, J., Lubos, D., Rodríguez, T. R., Rubio, B., Sahin, E., Saito, T. Y., Sakurai, H., Sinclair, L., Steppenbeck, D., Taniuchi, R., Wadsworth, R., Zielinska, M. |
| سنة النشر: | 2021 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | We studied the proton-rich $T_z=-1$ nucleus $^{70}$Kr through inelastic scattering at intermediate energies in order to extract the reduced transition probability, $B(E2;\;0^+ \rightarrow 2^+)$. Comparison with the other members of the $A=70$ isospin triplet, $^{70}$Br and $^{70}$Se, 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 $^{70}$Kr and $^{70}$Se contrary to the model predictions. Comment: accepted PRL |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.126.072501 |
| URL الوصول: | http://arxiv.org/abs/2101.02363 |
| رقم الأكسشن: | edsarx.2101.02363 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.126.072501 |
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