Comment on “Shell structure of Ti and Cr nuclei from measurements of g factors and lifetimes”

In a recent publication Ernst et al. [Phys. Rev. C 62, 024305 (2000)] suggest a shell structure description of Ti and Cr nuclei from systematic g factor and lifetime measurements of the 2⁺ and 4⁺ states of these nuclei, pointing out a disagreement between previous measurements and shell model calculations. We show that the systematics of previous and present g-factor measurements are not in significant disagreement, and they do not exclude the possibility of an onset of collectivity in the middle of the fp shell. The theoretical interpretation of the data is still an open question. A conflict between the ⁵⁰Cr g(4₁⁺) measurements may be attributed to statistical fluctuations, as large errors are assigned to both existing measurements, but not to the fusion excitation technique adopted in one of the measurements. It is suggested that the moments of the higher spin states must be determined with better precision to shed more light on the situation.