A new level scheme of 127I

Study of in-beam γ-ray spectroscopy of 127I has been performed using 124Sn(7Li, 4n)127 I reaction at 32 MeV beam energy. A new level scheme of 127I has been established including 25 new levels and 52 new γ transitions. Negative-parity levels based on 11/2- πh11/2 particle state have been observed up to (35/2-) extending our knowledge of decoupled structures to the heavier iodine isotope. Two ΔI = 2 yrast positive-parity levels have been proposed to be associated mainly with the πg7/2 configuration due to observations of several strong inter-band transitions. Two weakly populated ΔI = 2 positive-parity levels and a high-lying ΔI = 1 cascade have been newly identified and tentatively assigned as πd5/2 one-quasiparticle and three-quasiparticle bands, respectively.