Fig. 10: Angular correlation spectra of the 16.4 MeV state.

Angular correlation spectra (black squares) of the 16.4 MeV state under the spin-J assumption of 1 (a), 2 (b), 3 (c) and 4 (d), each compared to the sum (red-solid line) of the corresponding Legendre polynomial \(| {P}_{J}(\cos {\psi }^{{\prime} }){| }^{2}\) of order J  (blue-dotted line) and the background (gray-dashed line). All curves have been corrected by the simulated efficiencies. The error bars represent the statistical uncertainties (1 standard deviation). The corresponding reduced \({\widetilde{\chi }}^{2}\) are also indicated.