Systematics of 3− and 5− States in Ca40,42,44,48 and Ti50 From Inelastic Alpha Scattering

Abstract

From the scattering of 31-MeV alpha particles the existence of three $3^{-}$ states in ${\mathrm{Ca}}^{40,48}$, six $3^{-}$ states in ${\mathrm{Ca}}^{42,44}$, and a $5^{-}$ state in ${\mathrm{Ca}}^{40,42,48}$ (two in ${\mathrm{Ca}}^{44}$) have been found. The fractionation of the $3^{-}$ strength and the rapid and similar drop of $3^{-}$ and $5^{-}$ strength in going from $A=40\mathrm{}$ to $A=50\mathrm{}$ appear to be in disagreement with current ideas about the nature of these states.