Evidence for higher nodal band states with $^3$He cluster structure in $^{19}$Ne and prerainbows in $^3$He+$^{16}$O scattering

Abstract

The existence of a higher nodal band state with a $^{3}$He cluster structure, i.e. a vibrational mode in which the inter-cluster relative motion is excited, in $^{19}$Ne in addition to those with the $\alpha$ cluster structure in $^{20}$Ne and the $^{16}$O cluster structure in $^{32}$S, is suggested, which reinforces the importance of the concept of $^3$He-clustering in nuclei. This conclusion was reached by investigating $^{3}$He scattering from $^{16}$O in a wide range of incident energies and prerainbow oscillations.