To search for the $2_{1,\mathrm{ms}}^{+}$ state of ${}^{148}\mathrm{Sm}$, we studied the ${}^{148}\mathrm{Sm}(\gamma ,{\gamma }^{\text{'}})$ photon scattering reaction at the Stuttgart Dynamitron accelerator using bremsstrahlung with an endpoint energy of 3.2 MeV. Nuclear resonance fluorescence from eleven excited states, including three $2^{+}$ states, between 1.4 and 3.1 MeV has been observed. The data allow the identification of the $2_5^{+}$ state at 2146 keV as the $2_{1,\mathrm{ms}}^{+}$ state of ${}^{148}\mathrm{Sm}$.

• Received 27 December 2004

DOI:https://doi.org/10.1103/PhysRevC.71.044318