Study of Positive Parity Band Structures in Doubly Odd

The band structures of the odd-odd nucleus 120I were studied experimentally using the 11B + 112Cd → 120I + 3n fusion-evaporation reaction at a beam energy of 50 MeV at the TIFR Pelletron facility. The g- g coincidence events were collected with the high-efficiency, Indian National Gamma Array (INGA), consisting of sixteen Compton-suppressed clover detectors. The present dataset enabled a significant extension of the previously known positive parity level of 120I, with levels established up to ~10 MeV excitation energy. Four new γ-ray transitions were identified and placed in the level scheme and a new rotational band is also reported. Spin–parity assignments were made using Directional Correlation (DCO) ratios and polarisation (IPDCO) measurements, allowing determination of transition multipolarities In the present investigation, several positive- and negative-parity band structures are revised and on compare with the neighbouring nuclei for better understading of the positive parity state is observed in 120I.