Mössbauer Effect forFe57in Beryllium, Copper, Tungsten, and Platinum

The Mössbauer effect has been studied for ${\mathrm{Fe}}^{57}$ as an impurity in Be, Cu, W, and Pt. The positions of the resonances and the ratios of recoilless fractions at different temperatures were determined. The behavior of these quantities as a function of temperature indicates the approximate correctness of the simple expectation that the impurity should behave as if it were in a solid composed only of the impurity atoms with a Debye temperature given by ${\Theta }_{\mathrm{eff}}={\left(\frac{M_{\mathrm{host}}}{M_{\mathrm{impurity}}}\right)}^{\frac{1}{2}}{\Theta }_{\mathrm{host}}$.