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The neutron and proton two-particle nucleus 134Sb: New low-spin states observed in the decay of 134Sn and an estimate of the energy of the 7- isomer

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Excited states in the 134Sb nucleus, populated in the β--decay of 134Sn, have been studied at the mass separator OSIRIS. The 134Sn activity was produced via fast neutron-induced fission of 238U target. A main result was the discovery of a very low-lying first-excited state of 134Sb, at 13keV, which has led to a strong revision of the level scheme. The new results are compared with different theoretical calculations and with the known data for the analogous neutron and proton two-particle nucleus in the 208Pb region. On the basis of this comparison, the energy of the ( πg 7/2νf 7/2)7- isomer is estimated to be about 250keV, some 100keV lower than previously reported.

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Received: 21 March 2002 / Accepted: 16 May 2002 / Published online: 31 October 2002

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Korgul, A., Mach, H., Fogelberg, B. et al. The neutron and proton two-particle nucleus 134Sb: New low-spin states observed in the decay of 134Sn and an estimate of the energy of the 7- isomer. Eur Phys J A 15, 181–184 (2002). https://doi.org/10.1140/epja/i2001-10250-8

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  • DOI: https://doi.org/10.1140/epja/i2001-10250-8

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