Figure 1

$R_{4/2}$ values in the $Z=50–82$, $N=82–126$ region against $N_p{N}_n$. (a) All nuclei; (b) comparison of p-p ($Z=50–66$, $N=82–104$) with p-h ($Z=68–82$, $N=82–104$) regions; (c) comparison of h-h ($Z=68–82$, $N=106–126$) with the p-h region.Reuse & Permissions

Figure 2

$\delta V_{pn}$ values in the same major shell region as the nuclei shown in Fig. 1, plotted against $Z$ and $N$, as well as against the major shell fractional filling $f_p$ and $f_n$. The numbers in each box indicate the strength of $\delta V_{pn}$: lower numbers (1, 2) represent larger $\delta V_{pn}$ values. See legend at bottom. The shading also indicates the $\delta V_{pn}$ ranges. Updated from Ref. 19.Reuse & Permissions

Figure 3

Differences in $\delta V_{pn}$ values (upper left in each box) and in $R_{4/2}$ (lower right in each box) for pairs of nuclei in the p-p and p-h regions of Fig. 2. The $\Delta (\delta V_{pn})$ and $\Delta (R_{4/2})$ values are defined as $\delta V_{pn}(\mathrm{p}\mathrm{\text{−}}\mathrm{p})-\delta V_{pn}(\mathrm{p}\mathrm{\text{−}}\mathrm{h})$ and $R_{4/2}(\mathrm{p}\mathrm{\text{−}}\mathrm{p})-R_{4/2}(\mathrm{p}\mathrm{\text{−}}\mathrm{h})$ where the pairs of nuclei in each difference have the same neutron number and have proton numbers that are symmetric about midproton shell. For example, the third entry in the second row from the top gives the differences [$\Delta (\delta V_{pn})=56\mathrm{keV}$ and $\Delta R_{4/2}=0.39$] for the two nuclei with $N=90$ and $Z=64$ and 70. Negative numbers are underlined. The data are plotted in the positions of the p-p nuclei.Reuse & Permissions

Figure 4

$R_{4/2}$ and $\delta V_{pn}$ values in sequences of p-p and p-h nuclei. The panels give values for “diagonal” sets of nuclei in p-p and p-h regions. The sets of nuclei in (A), (B), and (C) are identified in the upper part.Reuse & Permissions