High-spin states with seniority v=4,4,6 in 119-126Sn
Abstract
The 119-126Sn nuclei have been produced as fission fragments in two reactions induced by heavy ions: 12C+238U at 90 MeV bombarding energy, 18O+208Pb at 85 MeV. Their level schemes have been built from gamma rays detected using the Euroball array. High-spin states located above the long-lived isomeric states of the even- and odd-A 120-126Sn nuclei have been identified. Moreover isomeric states lying around 4.5 MeV have been established in 120,122,124,126Sn from the delayed coincidences between the fission fragment detector SAPhIR and the Euroball array. The states located above 3-MeV excitation energy are ascribed to several broken pairs of neutrons occupying the nu h11/2 orbit. The maximum value of angular momentum available in such a high-j shell, i.e. for mid-occupation and the breaking of the three neutron pairs, has been identified. This process is observed for the first time in spherical nuclei.
Keywords
Cite
@article{arxiv.1205.1951,
title = {High-spin states with seniority v=4,4,6 in 119-126Sn},
author = {A. Astier and M. -G. Porquet and Ch. Theisen and D. Verney and I. Deloncle and M. Houry and R. Lucas and F. Azaiez and G. Barreau and D. Curien and O. Dorvaux and G. Duchene and B. J. P. Gall and N. Redon and M. Rousseau and O. Stezowski},
journal= {arXiv preprint arXiv:1205.1951},
year = {2012}
}
Comments
20 pages, 22 figures, 12 tables, accepted for publication in Physical Review C