Figure 1

Total projection spectrum of the $E_{\gamma }$-$E_{\gamma }$ matrix. Only prominent transitions of main reaction products are marked with their energies and nuclide symbols.Reuse & Permissions

Figure 2

Level scheme of ${}^{99}$Rh proposed based on analysis of the $E_{\gamma }$-$E_{\gamma }$ matrix. The bands are labeled “p${}_{1/2}$”, “neg1”, “neg2”, “pos1”, “pos2”, and “pos3” from left to right for reference in the text.Reuse & Permissions

Figure 3

Examples of $\gamma$-$\gamma$ coincidence spectra obtained by setting gates on the transitions within the positive-parity bands. These spectra were obtained from the $E_{\gamma }$-$E_{\gamma }$ matrix and provide support for the branching at the upper part of the positive-parity bands. Energy values are given above the peaks in units of keV. (a) A spectrum obtained by setting a gate on the 1205-keV transition from ${\frac{37}{2}}^{+}$ to ${\frac{33}{2}}^{+}$ in band “pos1”, which includes the one from ${\frac{35}{2}}^{+}$ to ${\frac{31}{2}}^{+}$ in band “pos3”. (b) A spectrum obtained by setting a gate on the 1053-keV transition from ${\frac{33}{2}}^{+}$ to ${\frac{29}{2}}^{+}$ in band “pos1”, which includes the one from ${\frac{31}{2}}^{+}$ to ${\frac{27}{2}}^{+}$ in band “pos3”. The peak labeled “1073c” is due to a contamination in the gate. (c) A spectrum obtained by setting a gate on the 1041-keV transition from ${\frac{29}{2}}^{+}$ to ${\frac{25}{2}}^{+}$ in band “pos2”. The peak with the symbol “${}^{68}$Zn” is due to the Coulomb excitation of the target. (d) A spectrum obtained by setting a gate on the 778-keV transition from ${\frac{13}{2}}^{+}$ to ${\frac{9}{2}}^{+}$ in band “pos2”.Reuse & Permissions

Figure 4

Examples of $\gamma$-$\gamma$ coincidence spectra obtained by setting gates on the transitions within band “p${}_{1/2}$”. These spectra can be used to extend the band to higher-spin states. Energy values are given above the peaks in units of keV. Each inset shows a vertically expanded spectrum for the high-energy region around 1000 keV. (a) A spectrum obtained by setting a gate on the 640-keV transition from ${\frac{17}{2}}^{-}$ to ${\frac{13}{2}}^{-}$ in band “p${}_{1/2}$”. (b) A spectrum obtained by setting a gate on the 681-keV transition from ${\frac{13}{2}}^{-}$ to ${\frac{9}{2}}^{-}$ in band “p${}_{1/2}$”. (c) A spectrum obtained by setting a gate on the 552-keV transition from ${\frac{9}{2}}^{-}$ to ${\frac{5}{2}}^{-}$ in band “p${}_{1/2}$”.Reuse & Permissions

Figure 5

Lower energy parts of $\gamma$-$\gamma$ coincidence spectra obtained by setting gates on the transitions within the proposed negative-parity band. These spectra can be used to extend the band to higher-spin states. Energy values are given above the peaks in units of keV. (a) A spectrum obtained by setting a gate on the 531-keV transition from ${\frac{29}{2}}^{(-)}$ to ${\frac{27}{2}}^{(-)}$ in band “neg1”. (b) A spectrum obtained by setting a gate on the 493-keV transition from ${\frac{19}{2}}^{+}$ to ${\frac{17}{2}}^{+}$ in band “pos2”. (c) A spectrum obtained by setting a gate on the 1341-keV transition from ${\frac{37}{2}}^{(-)}$ to ${\frac{33}{2}}^{(-)}$ in band “neg1”. (d) A spectrum obtained by setting a gate on the 1117-keV transition from ${\frac{23}{2}}^{(-)}$ to ${\frac{21}{2}}^{+}$ between bands “neg1” and “pos2”.Reuse & Permissions

Figure 6

Higher energy parts of the same $\gamma$-$\gamma$ coincidence spectra as those in Fig. 5. C.E. stands for Coulomb excitation. A peak marked 1424n is the transition of 1424 keV which could not be placed in the level scheme while appearing commonly in the spectra.Reuse & Permissions

Figure 7

Excitation energy relative to a rigid rotor reference as a function of the spin for (a) the negative-parity bands in ${}^{99}$Rh and (b) the lowest terminating bands whose configurations are listed in Table in neighboring nuclei (${}^{98,99,100}$Ru [4] and ${}^{101}$Rh [5]).Reuse & Permissions

Figure 8

Comparison of aligned angular momenta ($i_x$) for the $\pi p_{1/2}$ bands in ${}^{99,101,103}$Rh [10, 15, 16]. A Harris reference with $J_0=7.0{\hslash }^2{\mathrm{MeV}}^{-1}$ and $J_1=15.7{\hslash }^4{\mathrm{MeV}}^{-3}$ has been used.Reuse & Permissions

Figure 9

E-GOS curves for the $\pi p_{1/2}$ bands in (a) ${}^{95,97,99}$Tc [17, 18, 19] and (b) ${}^{99,101,103}$Rh [10, 15, 16]. Here $I_0$ stands for the spin value of the bandhead.Reuse & Permissions

Figure 10

Comparison of aligned angular momenta ($i_x$) for the positive-parity bands in ${}^{99}$Rh and ${}^{97}$Tc. A Harris reference with $J_0=6.0{\hslash }^2{\mathrm{MeV}}^{-1}$ and $J_1=15.7{\hslash }^4{\mathrm{MeV}}^{-3}$ has been used. The data and the band labels for ${}^{97}$Tc are taken from Ref. [21].Reuse & Permissions