OLIVEIRA, L.M.ROSSI, A.M.LOPES, R.T.RODRIGUES, L.N.2014-07-312014-07-312014-07-312014-07-312002OLIVEIRA, L.M.; ROSSI, A.M.; LOPES, R.T.; RODRIGUES, L.N. The influence of unstable signals for electron spin resonance dosimetry with synthetic A-type carbonated apatite. <b>Radiation Protection Dosimetry</b>, v. 101, n. 1/4, p. 539-544, 2002. DOI: <a href="https://dx.doi.org/10.1093/oxfordjournals.rpd.a006044">10.1093/oxfordjournals.rpd.a006044</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/7402.0144-8420http://repositorio.ipen.br/handle/123456789/7402Synthetic A-type carbonated apatite prepared in controlled conditions was irradiated at room temperature with 60Co gamma rays. The ESR spectrum was associated to axial CO2- and orthorhombic CO3- species. Radicals used as dose markers in biological apatites are long-lived paramagnetic species. The stability of the post-irradiation signal of A-type apatite was investigated for almost 2 years. Measurements showed variations in the spectra attributed to unstable CO3- species, which can be eliminated by thermal treatments at 100ºC for 24 h. Results indicated the potential use of an A-type carbonated apatite as a dosemeter.539-544closedAccessapatitescalcium phosphatesirradiationgamma radiationcobalt 60electron spin resonanceradicalssignalsstabilitydosimetryArtigo de periódico1/410110.1093/oxfordjournals.rpd.a006044