Abstract
A bremsstrahlung photon beam from electrons with end-point energies of 7.66 and 10.37 MeV was used for photoexciting levels in $^{23}\mathrm{Na}$. Values of $g\frac{{\ensuremath{\Gamma}}_{0}^{2}}{\ensuremath{\Gamma}}$ and $g{\ensuremath{\Gamma}}_{0}$ of 22 levels below 10 MeV were obtained using scattering and self-absorption measurements. The values for 7 levels are reported for the first time. The temperature variation of the scattering cross section was measured at $T=300$ K and $T=78$ K to study in some detail the effective temperature ${T}_{e}$ of metallic $^{23}\mathrm{Na}$. The results of the total $B(M{1}_{\ensuremath{\uparrow}})$ strength of $T=\frac{1}{2}$ levels below 9 MeV were found to be in excellent agreement with the large-scale shell-model calculations.[NUCLEAR REACTIONS $^{23}\mathrm{Na}(\ensuremath{\gamma},{\ensuremath{\gamma}}^{\ensuremath{'}}),E=7.66,10,37$ MeV bremsstrahlung.] Deduced ${E}_{x},g{\ensuremath{\Gamma}}_{0},B(M{1}_{\ensuremath{\uparrow}})$. Natural target.
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