Anomalous Behavior of 2+ Excitations around 132Sn
Nuclear Theory
2009-11-07 v2
Abstract
In certain neutron-rich Te isotopes, a decrease in the energy of the first excited 2+ state is accompanied by a decrease in the E2 strength to that state from the ground state, contradicting simple systematics and general intuition about quadrupole collectivity. We use a separable quadrupole-plus-pairing Hamiltonian and the quasiparticle random phase approximation to calculate energies, B(E2,0+ -> 2+) strengths, and g factors for the lowest 2+ states near 132Sn (Z >= 50). We trace the anomalous behavior in the Te isotopes to a reduced neutron pairing above the N = 82 magic gap.
Cite
@article{arxiv.nucl-th/0208042,
title = {Anomalous Behavior of 2+ Excitations around 132Sn},
author = {J. Terasaki and J. Engel and W. Nazarewicz and M. Stoitsov},
journal= {arXiv preprint arXiv:nucl-th/0208042},
year = {2009}
}
Comments
1 figure added. to be published in Phys. Rev. C