Energies and widths in ${}^{11}\mathrm{N}$

Using experimental information from ${}^{11}\mathrm{Be}$ and a simple potential model, I have computed energies and widths expected for several resonances in ${}^{11}\mathrm{N}$. The conclusion is that two or three expected resonances have never been observed.

Figure 1

Resonance energies from Guimaraes et al. [7] in the reaction ${}^{14}\mathrm{N}$(${}^3\mathrm{He}$, ${}^6\mathrm{He}$) are plotted vs those from Oliveira et al. [5] in the reaction ${}^{10}\mathrm{B}$(${}^{14}\mathrm{N}$, ${}^{13}\mathrm{B}$). The straight line corresponds to $E2=E1$.

Figure 2

As Fig. 1, but for widths.