Figure 1

Particle spectrum corresponding to a ΔE detector showing the regions used for the one- and two-α gates.Reuse & Permissions

Figure 2

$\gamma$-ray spectra in coincidence with the same transitions used to select the α particles belonging to the different channels in the reaction ${}^{18}\mathrm{O}+{}^{208}\mathrm{Pb}$: (a) ${}^{220}\mathrm{Ra}$, double gate on the 215- and 232-keV lines, (b) ${}^{219}\mathrm{Ra}$, double gate on the 295- and 297-keV lines, (c) ${}^{217}\mathrm{Rn}$, gate on the 317-keV lines, and (d) ${}^{216}\mathrm{Rn}$, gate on the 461-keV lines. Transitions labeled by their energies correspond to the nucleus indicated in each part.Reuse & Permissions

Figure 3

Angular distributions for one and two α particles firing one ΔE detector as a function of the polar angle θ. The reactions and the energy (in keV) of the transitions used to select the reaction channels are indicated. The L, M, and H following the gate label give an idea of the spin of the depopulated states; L, M, and H stand for low, medium, and high spin, respectively. In (a) and (b) filled (open) symbols correspond to E(${}^{18}\mathrm{O}$) = 91.5 (93.0) MeV. In (c) data correspond to either 91.5 or 93 MeV. In (d)–(f) E(${}^{18}\mathrm{O}$) = 92.0 MeV. In (g)–(i) data correspond to 90.0, 92.0, and 94.0 MeV.Reuse & Permissions

Figure 4

Angular correlations for two α particles firing two different ΔE detectors as a function of the angle between the detectors.Reuse & Permissions

Figure 5

Schematic description of the proposed model.Reuse & Permissions

Figure 6

Correlation between the deflexion angle of the α particle and the compound nucleus angular momentum.Reuse & Permissions