title: Thermoluminescent properties of crystalline halogen substituted uracils.
abstract: The thermoluminescent properties of crystalline uracil (U), and its halogen-substituted derivatives, 5 bromo-uracil (5BrU), 5 fluorouracil (5FU) and 5 iodo-uracil (5IU), have been investigated. The X-ray-induced thermoluminescent output increases in the order U less than 5 FU less than 5BrU less than 5IU. However, a reversed relationship is found for the U.V.-stimulated thermoluminescence. The thermoluminescence-emission spectra suggest that the same de-excitation process operates in all the halogen-substituted uracils, but the glow curves show that the charge-trapping characteristics are different for each material.
mesh_terms: D001976:Bromouracil / Q000528:radiation effects; D005472:Fluorouracil / Q000528:radiation effects; D005615:Freezing; D006358:Hot Temperature; D008163:Luminescent Measurements; D011830:Radiation Effects; D014466:Ultraviolet Rays; D014498:Uracil / Q000031:analogs & derivatives* / Q000528:radiation effects; D014965:X-Rays
chemical_list: D001976:Bromouracil; D014498:Uracil; D005472:Fluorouracil