High Spin States and Signature Inversion in 84 Rb

High-spin states in 84Rb have been studied by using the 70Zn (18O, p3n) 84Rb reaction at a beam energy of 75 MeV. The γ - γ coincidence, excitation function and ratios for directional correlation of oriented states were performed. A new level scheme was established in which the positive and negative parity bands have been extended up to 17+ and 17- with excitation energy about 7 MeV. The signature splitting and signature inversion of the positive parity yrast bands were observed and are discussed.