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High-spin states in the neutron rich fission fragments138Xe and139Xe |
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| Authors: | M. Bentaleb E. Lubkiewicz N. Schulz J. L. Durell F. Lidén C. J. Pearson W. R. Phillips J. Shannon B. J. Varley C. J. Lister I. Ahmad L. R. Morss K. L. Nash C. W. Williams |
| Affiliation: | 1. Centre de Recherches Nucléaires, IN2P3-CNRS/Université Louis Pasteur, B.P.20, F-67037, Strasbourg, France 3. Department of Physics, University of Manchester, M13 9PL, UK 4. A.W. Wright Nuclear Structure Laboratory, Yale University, 06511, New Haven, CT, USA 5. Argonne National Laboratory, 60439, Argonne, IL, USA |
| Abstract: | High-spin structures in the neutron-rich nuclei138Xe and139Xe have been investigated by observing prompt γ -rays from the spontaneous fission of248Cm with the Eurogam spectrometer. The partial level schemes were constructed on the basis of double-, triple- and quadruple-γ coincidences. The ground state band in138Xe has been extended up to 5 MeV excitation energy. The structure of the newly observed medium-spin states in139Xe is similar to the one of heavier N=85 isotones where vf 7 2/3 , vh9/2f 7 2/2 and vf 7 2/3 ? 3? multiplets have been observed. |
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