"Mirror energy difference at high spins in the mirror pair　67Se and 67As"
Kazunari Kaneko, Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503, Japan
(id #91)
Seminar: YesPoster: No
Invited talk: No
Recent experimental data have revealed large mirror energy differences (MED) between high-spin states in the mirror nuclei 67Se [1] and 67As [2], the heaviest pair where the MED has been observed so far. This corresponds generally to the isospin symmetry breaking caused by the Coulomb force and the nucleon-nucleon interactions [3], with the details yet to be explored. By employing large-scale shell model calculations [4], we show that the electromagnetic spin-orbit interaction and the Coulomb monopole radial term are important for the observed large MED in this mirror pair. Differing from what has been suggested for lighter nuclei, this large MED is attributed to the proton pair excitations from the p3/2 and f7/2 orbits to the g9/2 orbit and the spin alignment of the g9/2 protons at high spins. The relation of the MED to deformation is discussed.
1. G. de Angelis, Prog. Part. Nucl. Phys. 59, 409 (2007).
2. D. G. Jenkins et al., Phys. Rev. C 64, 064311 (2001).
3. M. A. Bentley and S. M. Lenzi, Prog. Part. Nucl. Phys. 59, 497 (2007).
4. M. Honma, T. Otsuka, T. Mizusaki, and M. Hjorth-Jensen, Phys. Rev. C 80, 064323 (2009).
1. G. de Angelis, Prog. Part. Nucl. Phys. 59, 409 (2007).
2. D. G. Jenkins et al., Phys. Rev. C 64, 064311 (2001).
3. M. A. Bentley and S. M. Lenzi, Prog. Part. Nucl. Phys. 59, 497 (2007).
4. M. Honma, T. Otsuka, T. Mizusaki, and M. Hjorth-Jensen, Phys. Rev. C 80, 064323 (2009).
