The influence of unstable signals for electron spin resonance dosimetry with synthetic A-type carbonated apatite

L. M. De Oliveira; A. M. Rossi; R. T. Lopes; L. N. Rodrigues; Y. S. Horowitz; L. Oster

doi:10.1093/oxfordjournals.rpd.a006044

The influence of unstable signals for electron spin resonance dosimetry with synthetic A-type carbonated apatite

L. M. De Oliveira, A. M. Rossi, R. T. Lopes, L. N. Rodrigues, Y. S. Horowitz, L. Oster

Department of Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Synthetic 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 100°C for 24 h. Results indicated the potential use of an A-type carbonated apatite as a dosemeter.

Original language	English
Pages (from-to)	539-544
Number of pages	6
Journal	Radiation Protection Dosimetry
Volume	101
Issue number	1-4
DOIs	https://doi.org/10.1093/oxfordjournals.rpd.a006044
State	Published - 1 Jan 2002

ASJC Scopus subject areas

Radiation
Radiological and Ultrasound Technology
Radiology Nuclear Medicine and imaging
Public Health, Environmental and Occupational Health

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10.1093/oxfordjournals.rpd.a006044

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title = "The influence of unstable signals for electron spin resonance dosimetry with synthetic A-type carbonated apatite",

abstract = "Synthetic 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 100°C for 24 h. Results indicated the potential use of an A-type carbonated apatite as a dosemeter.",

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T1 - The influence of unstable signals for electron spin resonance dosimetry with synthetic A-type carbonated apatite

AU - De Oliveira, L. M.

AU - Rossi, A. M.

AU - Lopes, R. T.

AU - Rodrigues, L. N.

AU - Horowitz, Y. S.

AU - Oster, L.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Synthetic 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 100°C for 24 h. Results indicated the potential use of an A-type carbonated apatite as a dosemeter.

AB - Synthetic 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 100°C for 24 h. Results indicated the potential use of an A-type carbonated apatite as a dosemeter.

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ER -

The influence of unstable signals for electron spin resonance dosimetry with synthetic A-type carbonated apatite

Abstract

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