RESPONSE OF THERMOLUMINESCENT LITHIUM-FLUORIDE (TLD-100) TO PHOTON BEAMS OF 275-EV, 400-EV, 500-EV, 600-EV, 730-EV, 900-EV, 1200-EV, 1500-EV, AND 2550-EV

LiF:Mg,Ti (TLD-100) extruded ribbons and cleaved crystals were exposed to monoenergetic photons of 275-2550 eV energy to determine their-pot ential usefulness as radiation dosimeters for radiobiology experiments at these energies. The radiation source was synchrotron radiation fro m the 1 GeV electron storage ring, Aladdin. We report no response and glow curves for He- and air-annealed dosimeters. The undesirable effec ts of air annealling increase with decreasing photon penetration in th e dosimeter. Under certain experimental conditions, UV radiation produ ced anomalous bleaching of high-temperature traps. The crystals and th e chips presented a supralinear response. Supralinearity factors were determined to be of the order of 1.5 for crystals, and 1.7 for the chi ps. Our results indicate that TLDs are a reliable means to monitor the total energy deposited in irradiated cells and are now used routinely for radiobiology cell irradiations.