Properties of ${\mathrm{P}}^{30}$ Levels from the Reaction ${\mathrm{Si}}^{29}(p, \gamma ){\mathrm{P}}^{30}$. II

A previous investigation of the $\gamma$-ray decay schemes of 7 resonances in the reaction ${\mathrm{Si}}^{29}(p, \gamma ){\mathrm{P}}^{30}$ in the range $E_p=700-1750\mathrm{}$ keV has been extended to 24 resonances in the range $E_p=300-1800\mathrm{}$ keV. The new decay scheme studies were conducted with a 40-cc Ge(Li) detector. The spins, parities, isobaric spins, lifetimes, and transition multipolarity mixings for many resonances and bound states of ${\mathrm{P}}^{30}$ have been determined from an extensive series of angular-correlation, linear-polarization, and Doppler-shift-attenuation measurements. New resonance information includes the discovery that resonances previously reported at $E_p=1505, 1748, \mathrm{and} 1772$ keV are each doublets. The latter two have components at 1746 and 1749, and at 1773 and 1775 keV, respectively. The 1505-keV "resonance" was found to be a doublet with a separation of 0.7±0.1 keV by means of high-resolution elastic-scattering measurements. Unique spin assignments for 15 and parity assignments for 11 resonance levels were obtained. The observed resonance strengths $\frac{\mathrm{}(2J+1)\mathrm{}{\Gamma }_{\gamma }{\Gamma }_p}{\Gamma }$ vary between 0.077 and 14 eV. Several unusually broad odd-parity resonances were observed which have large reduced widths for $p$-wave and $f$-wave capture. The strong contribution of $1f_{\frac{7}{2}}$, $2p_{\frac{3}{2}}$, and $2p_{\frac{1}{2}}$ orbitals to the configuration of states near $E_x=7\mathrm{}$ MeV in ${\mathrm{P}}^{30}$ is revealed. The influence of isobaric spin on the level structure and $\gamma$-ray decay properties is apparent. The $2^{-}$ resonances at $E_p=1470\mathrm{} \mathrm{and} 1686$ keV and the $4^{-}$ doublet at 1505 keV are identified as $T$-admixed pairs. Significant revisions of the decay schemes of the 1.45-, 2.94-, 4.14-, 4.50-, and 4.92-MeV levels have resulted from the 40-cc Ge(Li) spectra. The "4.92-MeV level" is shown to be a doublet with components at 4.921±0.002 and 4.945±0.005 MeV. By combining results of the angular-correlation, linear-polarization, and lifetime measurements, the following $J^{\pi }$ assignments are derived for bound levels: 0.71($1^{+}$), 1.45($2^{+}$), 1.97($3^{+}$), 2.54(