Fig. 4: The calculated reduced width amplitudes of the \({0}_{{{{{{{{\rm{I}}}}}}}}}^{+}\) state and \({0}_{{{{{{{{\rm{II}}}}}}}}}^{+}\) state in ²⁰Ne in the channel of ¹⁶O (\({0}_{6}^{+}\)) + α.

The horizontal axis a can be considered to represent the distance between the α and ¹⁶O (\({0}_{6}^{+}\)) clusters. The vertical coordinates represent ay(a) and y(a) is the reduced width amplitude defined in Eq. (8). The ay(a) curves of \({0}_{{{{{{{{\rm{I}}}}}}}}}^{+}\) state and \({0}_{{{{{{{{\rm{II}}}}}}}}}^{+}\) state are shown in red color and blue color, respectively.