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The backbending phenomenon in $^{48}$Cr has been investigated using therecently developed Projected Configuration Interaction (PCI) method, in whichthe deformed intrinsic states are directly associated with shell model (SM)wavefunctions. Two previous explanations, (i) $K=0$ band crossing, and (ii)$K=2$ band crossing have been reinvestigated using PCI, and it was found thatboth explanations can successfully reproduce the experimental backbending. ThePCI wavefunctions in the pictures of $K=0$ band crossing and $K=2$ bandcrossing are highly overlapped. We conclude that there are no unique intrinsicstates associated with the yrast states after backbending in $^{48}$Cr.

Can one identify the intrinsic structure of the yrast states in $^{48}$Cr after the backbending?