Photoactivation measurements on ${}^{144}\mathrm{Sm}$ have been performed with bremsstrahlung endpoint energies from 10.0 to 15.5 MeV at the bremsstrahlung facility of the superconducting electron accelerator ELBE of Forschungszentrum Dresden-Rossendorf. The measured activation yield for the ${}^{144}\mathrm{Sm}$($\gamma ,n$) reaction is compared with the calculated yield using cross sections from previous photoneutron experiments. The activation yields measured for all disintegration channels ${}^{144}\mathrm{Sm}$($\gamma ,n$), ($\gamma ,p$), and ($\gamma ,\alpha$) are compared to the yield calculated by using Hauser-Feshbach statistical models. A new parametrization of the photon strength function is presented and the yield simulated by using the modified photon strength parameters is compared to the experimental data.

• Received 19 November 2009

DOI:https://doi.org/10.1103/PhysRevC.81.055806