Incoherent scattering of 59.54 keV gamma rays for some rare earth elements at low photon momentum transfers

Incoherent scattering functions S(x, Z) for six rare earth elements were evaluated from accurately measured whole atom differential incoherent scattering cross sections for 59.54 keV γ-rays scattered at 30 deg., 45 deg., 60 deg. and 90 deg. scattering angles corresponding to 1.24, 1.84, 2.40 and 3.39 Angstrom-1 photon momentum transfers. Our results for S(x, Z) are the first for these rare earth elements