Probing the Linewidth of the 12.4-keV ${}^{45}$Sc Isomeric Resonance in Solids by Nuclear Forward Scattering

Peifan Liu, Miriam Gerharz, Berit Marx-Glowna +37

The ${}^{45}$Sc transition from the nuclear ground state to the 12.389-keV isomer (lifetime 0.46~s) has an ultranarrow natural linewidth $Γ_{\ind{0}}\simeq 1.4$~feV, corresponding to…