The M1 γ decay of the 709-keV $1^{+}$ state of ${}_{}{}^{30}{}_{}{}^{}\mathrm{P}$ to the 677-keV $0^{+}$ level has been measured to be (1.25±0.23)×${10}^{\mathrm{-}3}$ relative to the ground-state branch. From this result, the known lifetime of the 709-keV level, and the strength of the analogous ${}_{}{}^{30}{}_{}{}^{}\mathrm{S}$ ${\beta }^{+}$ decay, the M1 width, and the ratio of the orbital and spin parts of the M1 matrix elements are deduced.

• Received 26 June 1986

DOI:https://doi.org/10.1103/PhysRevC.34.1477