  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.
