Band crossing and signature splitting in odd mass f p shell nuclei

Structure of two sets of mirror nuclei: V-47-Cr-47 and C-49-Mn-49, as well as V-49 and M-51, is studied using the projected shell model. Their yrast s pectra are described as an interplay between the angular momentum projected states around the Fermi level which carry different intrinsic K-quantum nu mbers. The deviations from a regular rotational sequence are attributed to band crossing and signature splitting, which are usually discussed in heavy nuclear systems. Our results agree reasonably with experimental data, and are comparable with those from the full pf shell model calculations. (C) 20 01 Elsevier Science B.V. All rights reserved.