Abstract
Excited states in 126,127,128Xe were populated via 122Sn(9Be, xnγ) fusion-evaporation reaction at a beam energy of 48 MeV. A positive parity rotational-like sequence of ΔI=2γ-transitions, which is found to decay into the negative parity band via E1 transitions, is observed above Iπ=19/2+ state at 2307 keV in 127Xe. Such enhanced E1 γ-transitions are also observed between the antimagnetic rotational (AMR) and longitudinal wobbling (LW) bands in this nucleus. These indicate the presence of simplex symmetry with s=±i excitation in 127Xe.
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