Resonance fluorescence of giant magnetic dipole states inMg24

$\gamma$-ray resonance fluorescence of three magnetic dipole states in ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ at 9827 ± 3, 9967 ± 3, and 10711 ± 3 keV was observed using bremsstrahlung and a 100 ${\mathrm{cm}}^3$ Ge(Li) detector. The measured intensity ratios to the first excited state and the ground state were found to be ${0.28}_{-0.18\mathrm{}}^{+0.26\mathrm{}}$, ${0.45}_{-0.13\mathrm{}}^{+0.16\mathrm{}}$, and ${0.23}_{-0.06\mathrm{}}^{+0.07\mathrm{}}$, respectively. Integrated scattering cross sections and decay widths of these levels were determined relative to the known ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(\gamma , x{\gamma }^{\prime })$ cross section.