A new isomer in 136 Ba populated by deep inelastic collisions
Japan Atomic Energy Research Institute, 319-1195, Tokai, Ibaraki, Japan
2 Institute of Modern Physics, Chinese Academy of Science, 730000, Lanzhou, PRC
3 Chiba University, Inage-ku, 263-8522, Chiba, Japan
4 Chiba Institute of Technology, 275-0023, Narashino, Chiba, Japan
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Excited states in 136Ba, populated in deep inelastic collisions by the interaction of 450 MeV 82Se ions with a 139La target, have been studied by means of in-beam -ray spectroscopy. A new isomer with has been identified at an excitation energy E x = 3.357 MeV. The half-life was determined as ns. The extracted B(E2) value is much smaller than those in 132Te and 134Xe. This hindrance is investigated by a shell model calculation.
© Società Italiana di Fisica and Springer-Verlag, 2004