Abstract
We study for the first time the internal structure of Te140 through the β-delayed γ-ray spectroscopy of Sb140. The very neutron-rich Sb140 nuclei with Z=51 and N=89 were produced by the in-flight fission of U238 beams at the Radioactive Isotope Beam Factory, RIKEN. The half-life and spin-parity of Sb140 are reported as 173±12 ms and 3-, respectively. In addition to the excited states of Te140 produced by the β-decay branch, the β-delayed one-neutron and two-neutron emission branches were also established. By identifying the first 2+ and 4+ excited states of Te140, we found that Te isotopes persist in their vibrator character with E(4+)/E(2+)=2. We discuss the distinctive features manifest in this region revealed in pairs of isotopes with the same neutron holes and particles with respect to N=82.
Original language | English |
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Article number | 044322 |
Journal | Physical Review C |
Volume | 95 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2017 Apr 25 |
Bibliographical note
Publisher Copyright:© 2017 American Physical Society.
ASJC Scopus subject areas
- Nuclear and High Energy Physics