Incoherent scattering functions S(x, Z) for six rare earth elements were ev
aluated from accurately measured whole atom differential incoherent scatter
ing cross sections for 59.54 keV gamma -rays scattered at 30 degrees, 45 de
grees, 60 degrees and 90 degrees 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. (C) 2001 Elsevier Sci
ence Ltd. All rights reserved.