Spectroscopy of cross-conjugate nuclei 46Ti–50Cr and 47V–49Cr near the f7/2-shell band termination

High-spin states in the cross-conjugate pairs of nuclei 46Ti–50Cr and 47V–49Cr have been investigated using the reaction 28Si+natSi at a laboratory energy of 125 MeV. Coincidence spectra, in some cases gated by charged particle detection, allow the yrast level schemes of all four nuclei to be extended, up to the f7/2-shell band termination at 14+ and 312- in 46Ti and 49Cr, and beyond to 17+ and 352- in 50Cr and 47V. Opposite-parity bands in 46Ti and 47V were observed up to 11- and 312+, respectively. Lifetimes derived from DSAM measurements provide B(E2) and B(M1) values for transitions among the higher levels of each of the nuclei. These are compared with earlier measurements and with f7/2- and fp-shell model calculations. No model calculations have been published for the opposite-parity bands, but their level spacing and reduced transition rates support a spectator nature of the sd hole.