${\mathit{f}}_{7/2}$ proton alignment in ${}_{}{}^{49}{}_{}{}^{}\mathrm{Cr}$

The magnetic moment and lifetime of the 19/$2^{\mathrm{-}}$, 4.367 MeV state in ${}_{}{}^{49}{}_{}{}^{}\mathrm{Cr}$ have been measured in a transient magnetic field experiment. The nuclei were excited in the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$${(}^{40}$Ca,2pn${)}^{49}$Cr reaction and recoiled in a thick polarized gadolinium foil. The field strength was calibrated by a simultaneous g-factor measurement of excited states in ${}_{}{}^{50}{}_{}{}^{}\mathrm{Cr}$ and ${}_{}{}^{46}{}_{}{}^{}\mathrm{Ti}$. The mean lieftime, found from Doppler-shifted line-shape analysis, is τ(19/$2^{\mathrm{-}}$)=2.7(2) ps and the g factor is g=+0.78(12). The g value implies a substantial ${\mathit{f}}_{7/2}$ proton contribution to the total spin of this state and the result is discussed in terms of both the shell model and the cranked shell model.