Gamma-ray studies at the 2876- and 2879-keV resonances inAl27+p

The $6^{-}$ assignment to the 14.358-MeV level of ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ and the concomitant $M1\mathrm{}$ character of the 14.358→11.577-MeV transition have been made rigorous by a linear-polarization measurement of this radiation at the 2876-keV resonance in ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}$+$p$. The spin and parity of the 2879-keV resonance, $E_x=14.361\mathrm{}$ MeV, are restricted to $2^{+}$, 5, or $6^{+}$, with $2^{+}$ preferred.