Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-10-06
Phys.Rev. C70 (2004) 054313; Erratum-ibid. C74 (2006) 059903
Physics
Nuclear Physics
Nuclear Theory
8 pages, 7 figures, accepted for publication in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.70.054313
The ground and low-lying states of neutron-rich exotic Te and Sn isotopes are studied in terms of the nuclear shell model by the same Hamiltonian used for the spherical-deformed shape phase transition of Ba isotopes, without any adjustment. An anomalously small value is obtained for $B(E2;0^+_1\to 2^+_1)$ in $^{136}$Te, consistently with a recent experiment. The levels of $^{136}$Te up to yrast $12^+$ are shown to be in agreement with observed ones. It is pointed out that $^{136}$Te can be an exceptionally suitable case for studying mixed-symmetry 1$^+$, 2$^+$ and 3$^+$ states, and predictions are made for energies, M1 and E2 properties. Systematic trends of structure of heavier and more exotic Sn and Te isotopes beyond $^{136}$Te are studied by Monte Carlo Shell Model, presenting an unusual and very slow evolution of collectivity/deformation.
Honma Michio
Mizusaki Takahiro
Otsuka Takaharu
Shimizu Noritaka
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