Nuclear structure of 140Te with N = 88: Structural symmetry and asymmetry in Te isotopes with respect to the double-shell closure Z = 50 and N = 82

C. -B. Moon; P. Lee; C. S. Lee; A. Odahara; R. Lozeva; A. Yagi; F. Browne; S. Nishimura; P. Doornenbal; G. Lorusso; P. -A. Söderström; T. Sumikama; H. Watanabe; T. Isobe; H. Baba; H. Sakurai; R. Daido; Y. Fang; H. Nishibata; Z. Patel; S. Rice; L. Sinclair; J. Wu; Z. Y. Xu; R. Yokoyama; T. Kubo; N. Inabe; H. Suzuki; N. Fukuda; D. Kameda; H. Takeda; D. S. Ahn; D. Murai; F. L. Bello Garrote; J. M. Daugas; F. Didierjean; E. Ideguchi; T. Ishigaki; H. S. Jung; T. Komatsubara; Y. K. Kwon; S. Morimoto; M. Niikura; I. Nishizuka; K. Tshoo

doi:10.1103/physrevc.95.044322

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arXiv · 1512.07324

Nuclear structure of 140Te with N = 88: Structural symmetry and asymmetry in Te isotopes with respect to the double-shell closure Z = 50 and N = 82

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Abstract

We study for the first time the internal structure of 140Te through the beta-delayed gamma-ray spectroscopy of 140Sb. The very neutron-rich 140Sb, Z = 51 and N = 89, ions were produced by the in-flight fission of 238U beam on a 9Be target at 345 MeV per nucleon at the Radioactive Ion Beam Factory, RIKEN. The half-life and spin-parity of 140Sb are reported as 124(30) ms and (4-), respectively. In addition to the excited states of 140Te produced by the beta-decay branch, the beta-delayed one-neutron and two-neutron emission branches were also established. By identifying the first 2+ and 4+ excited states of 140Te, we found that Te isotopes persist their vibrator character with E(4+)/E(2+) = 2. We discuss the distinctive features manifest in this region, such as valence neutron symmetry and asymmetry, revealed in pairs of isotopes with the same neutron holes and particles with respect to N = 82.

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C. -B. Moon, P. Lee, C. S. Lee, A. Odahara, R. Lozeva, A. Yagi, F. Browne, S. Nishimura, P. Doornenbal, G. Lorusso, P. -A. Söderström, T. Sumikama, H. Watanabe, T. Isobe, H. Baba, H. Sakurai, R. Daido, Y. Fang, H. Nishibata, Z. Patel, S. Rice, L. Sinclair, J. Wu, Z. Y. Xu, R. Yokoyama, T. Kubo, N. Inabe, H. Suzuki, N. Fukuda, D. Kameda, H. Takeda, D. S. Ahn, D. Murai, F. L. Bello Garrote, J. M. Daugas, F. Didierjean, E. Ideguchi, T. Ishigaki, H. S. Jung, T. Komatsubara, Y. K. Kwon, S. Morimoto, M. Niikura, I. Nishizuka, K. Tshoo. 2015-12-23. Nuclear structure of 140Te with N = 88: Structural symmetry and asymmetry in Te isotopes with respect to the double-shell closure Z = 50 and N = 82. https://doi.org/10.1103/physrevc.95.044322

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