Figure 1

Parallel-momentum distributions for two-proton knockout reactions. The theoretical curves include the Lorentz correction and the broadening arising mainly from the target thickness. The full drawn curves are estimates for knockout of two protons in $0d$ states. For ${}^{28}\mathrm{M}\mathrm{g}$ the width (FWHM) without the stopping power correction would be $380\mathrm{M}\mathrm{e}\mathrm{V}/c$; the comparison value for two protons in $1s$ states (dashed) is $282\mathrm{M}\mathrm{e}\mathrm{V}/c$ and for a single $0d$ knockout (dash-dotted) $298\mathrm{M}\mathrm{e}\mathrm{V}/c$.Reuse & Permissions

Figure 2

Gamma-ray spectra in counts per 32 keV bins. The main peaks, all representing $2^{+}\to 0^{+}$ and $4^{+}\to 2^{+}$ transitions, are labeled by the energy in MeV (uncertainty 0.02 MeV) and by the absolute intensity relative to the number of observed fragments. The dashed peak shapes are simulated response curves normalized to match the number of counts in the full-energy peaks. The continuous distribution (dashed line) is attributed to radiations from the target and is adjusted to the ${}^{28}\mathrm{M}\mathrm{g}$ data as a sum of a straight line and an exponential. The same continuum, scaled with the number of residues, is shown in the ${}^{34}\mathrm{S}\mathrm{i}$ spectrum. The full-drawn lines represent the sum of all three components.Reuse & Permissions