Onset of collectivity in the ground-state band of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Cr</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>50</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>
Аннотация
Transient field precessions of the first excited states in $^{50}\mathrm{Cr}$ have been measured. The states were excited by the inverse $^{12}\mathrm{C}$${(}^{40}$Ca, 2p${)}^{50}$Cr reaction and the recoil nuclei traversed a thick gadolinium foil, where they experienced the rotation. The observed precessions, for the ${2}^{+}$,${4}^{+}$,${6}^{+}$,${8}^{+}$ states of the ground-state band, were equal within experimental error indicating these states have g factors similar to that of the ${2}^{+}$ state value of 0.55\ifmmode\pm\else\textpm\fi{}0.10 measured previously. This feature is contrary to the predictions of the shell model and suggests a higher collectivity for the ground-state band. Limited results were also obtained for the cross conjugate nucleus $^{46}\mathrm{Ti}$ supporting this conclusion.