$2p$ decays of ${}^{11}\mathrm{O}$

In a potential model, I have estimated decay widths for ${}^{11}\mathrm{O}$ to ${}^9\mathrm{C}+2p$ for sequential decay through ${}^{10}\mathrm{N}$ resonances and by simultaneous $2p$ (${}^2\mathrm{He}$) decay by integrating over the relevant energy profiles. Results indicate that sequential decays through positive-parity resonances are only slightly smaller than those through negative-parity resonances. Simultaneous decay is predicted to be larger than sequential.

Figure 1

As a function of $P\left(s^2\right)$ in ${}^{11}\mathrm{O}$, calculated widths for sequential decays through positive-parity ${}^{10}\mathrm{N}$ resonances (short dashed line), through negative-parity resonances (long dashed line), and their sum (solid line).

Figure 2

The same as in Fig. 1, but for simultaneous ${}^2\mathrm{He}$ decay from the $p$-shell component of ${}^{11}\mathrm{O}$(g.s.) (short dashed line), from the ${\left(sd\right)}^2$ component (long dashed line), and from the total (solid line). (The $n=1$ and $n=2$ amplitudes have been added coherently.)