title: Internal in vitro dosimetry for fish using hydroxyapatite-based EPR detectors.
abstract: A number of aquatic ecosystems were exposed to ionizing radiation as a result of the activities of the Mayak Production Association in the Southern Urals, former Soviet Union, in the 1950s. Currently, fishes inhabiting contaminated lakes are being actively studied. These investigations need dosimetric support. In the present paper the results of a pilot study for elaborating an EPR dosimeter which can be used for internal dosimetry in vitro are described. Biological hydroxyapatite is proposed here to be used as a detecting substance. More specifically, small hydroxyapatite grains are proposed for use as point detectors fixed in a solid matrix. After having been pelletized, the detectors were covered by Mylar and placed in the body of a fish to be stored in the fridge for several months. Application of the detectors for internal fish dosimetry demonstrated that the enamel sensitivity is sufficient for passive detection of ionizing radiation in fishes inhabiting contaminated lakes in the Southern Urals.
authors.affiliation: Institute of Metal Physics, Urals Division of Russian Academy of Sciences, 18, S. Kovalevskaya Str, 620137, Yekaterinburg, Russia, deniv@imp.uran.ru.
authors.forename: D V
authors.initials: DV
authors.lastname: Ivanov
authors.forename: E A
authors.initials: EA
authors.lastname: Shishkina
authors.forename: D I
authors.initials: DI
authors.lastname: Osipov
authors.forename: R A
authors.initials: RA
authors.lastname: Razumeev
authors.forename: E A
authors.initials: EA
authors.lastname: Pryakhin
mesh_terms: D000818:Animals; D003743:Dental Enamel / Q000528:radiation effects; D017886:Durapatite / Q000528:radiation effects*; D017753:Ecosystem; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005399:Fishes; D066298:In Vitro Techniques; D010865:Pilot Projects; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012426:Russia; D014875:Water Pollutants, Radioactive / Q000032:analysis; D014878:Water Pollution, Radioactive / Q000032:analysis
chemical_list: D014875:Water Pollutants, Radioactive; D017886:Durapatite
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