CaF2:Dy (TLD-200) chips were irradiated with monoenergetic photon beam
s of synchrotron radiation of 275 400, 500, 600, 730, 900, 1200, 1500
and 2550 eV energy. The phosphor response as a function of total energ
y delivered is reported. Glow curves for He- and air-annealed dosimete
rs are presented, showing the adverse effect of air anneal. Supralinea
rity factors based on the integrated TL response and on the height of
the 200 degrees C peak were determined and are reported.