title: Paramagnetic resonance in tooth enamel created by ultraviolet light.
abstract: Paramagnetic centres are present in human tooth enamel after irradiation with ultraviolet light. Their thermal stability and electron spin resonance spectrum coincide with those of the ion radicals created with gamma-rays are used in geological or archaeological dating and accident dosimetry. The long wavelength tail of their creation spectrum intersects with the short wavelength tail of the solar spectrum reaching Earth's surface, thus raising the question about the possible effect of solar irradiation on dating and dosimetry.
authors.affiliation: Institute of Chemical Physics and Biophysics, Tallinn, Estonia.
authors.forename: G
authors.initials: G
authors.lastname: Liidja
authors.forename: J
authors.initials: J
authors.lastname: Past
authors.forename: J
authors.initials: J
authors.lastname: Puskar
authors.forename: E
authors.initials: E
authors.lastname: Lippmaa
mesh_terms: D003743:Dental Enamel / Q000737:chemistry* / Q000528:radiation effects*; D003804:Dentin / Q000737:chemistry / Q000528:radiation effects; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals / Q000032:analysis; D006801:Humans; D014466:Ultraviolet Rays
chemical_list: D005609:Free Radicals