| (a) $\gamma$-ray energy spectrum in coincidence with the $^{29}$Ne$(p,pn)$$^{28}$Ne reaction, after Doppler-shift correction. The fit result (blue line) includes simulated DALI2 response functions (red dashed lines) and a double-exponential background (black dashed line). The $\gamma$-ray spectra are shown for a gate on the 1323-keV (b) and 1732-keV (c) transitions. The self-coincidences in (b) originate from the Compton events of transitions at high energy. The gate used for $\gamma-\gamma$ analysis in (c) was shifted from the centroid of the 1732-keV peak to minimize the cross contamination from overlapping peaks. |
| Experimental and calculated level schemes for $^{28}$Ne. Excitation energies, spins and parities are provided beside the levels. Observed $\gamma$-ray energies and their relative intensities are also given. The experimental spin-parity assignments are based on the analysis on the shapes of the parallel momentum distribution obtained in coincidence with the transitions. Three sets of the calculated level schemes using different shell-model interactions SDPF-M, SDPF-U-MIX and EEdf1 are shown for comparison. See details in the text. |
| Measured parallel momentum distributions for the $^{28}$Ne residues obtained following the $^{29}$Ne($p,pn)$ in coincidence with $\gamma$-ray transitions. The distribution of the 1323-keV state was obtained by subtracting the contributions from the feeding states. The experimental data are compared with the shapes computed from the DWIA calculations when assuming neutron-removal from the 2$s_{1/2}$ (green), 2$p_{3/2}$ (red) , 1$d_{3/2}$ (blue), and 1$f_{7/2}$ (cyan) orbitals. |
| Comparison between (a) the measured partial cross sections and those calculated to the bound shell-model final states obtained using different interactions: (b) SDPF-M, (c) SDPF-U-MIX, and (d) EEdf1. The SDPF-M results are taken from Refs.~\cite{Kob29, eikonal_arxiv}. Contributions of neutron removal from 2$s_{1/2}$, 2$p_{3/2}$, 1$d_{3/2}$, and 1$f_{7/2}$ orbitals are colored by green, red, blue, and cyan, respectively. The single-particle cross sections are calculated using the DWIA framework. The experimental ground-state cross section should be seen as an upper limit. The experimental inclusive cross section and the sum of calculated partial cross sections are also shown for each case. |
| Same as Fig.~\ref{fig:xsec} but with the removal cross sections calculated using the eikonal dynamical model. |