Abstract.
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 \(\gamma\)-ray spectroscopy. A new isomer with \(I^\pi = (10^ + )\) has been identified at an excitation energy E x = 3.357 MeV. The half-life was determined as \(T_{1/2} = 94\pm10\) ns. The extracted B(E2) value is much smaller than those in 132Te and 134Xe. This hindrance is investigated by a shell model calculation.
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Communicated by D. Schwalm
Received: 22 September 2003, Revised: 11 November 2003, Published online: 6 April 2004
PACS:
21.10.Tg Lifetimes - 23.20.Lv \(\gamma\) transitions and level energies - 27.60. + j \(90\leq A\leq 149\)
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Shizuma, T., Gan, Z.G., Ogawa, K. et al. A new isomer in 136 Ba populated by deep inelastic collisions. Eur. Phys. J. A 20, 207–210 (2004). https://doi.org/10.1140/epja/i2003-10163-6
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DOI: https://doi.org/10.1140/epja/i2003-10163-6