Journal of Radioanalytical and Nuclear Chemistry
Volume/Issue:
Volume 256: Issue 3
Radiation effects in plutonium and carbonate co-doped calcium hydroxy apatite: An EPR study
Authors:
V. Natarajan Bhabha Atomic Research Centre Radiochemistry Division Radiochemistry Division Trombay, Mumbai 400085 India

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T. Seshagiri Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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R. Veeraraghavan Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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M. Sastry Bhabha Atomic Research Centre Radiochemistry Division Trombay, Mumbai 400085 India

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Pages:
445–449
Online Publication Date:
31 Oct 2004
Publication Date:
17 Jun 2003
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1024591414217
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Abstract  

Electron paramagnetic resonance studies were conducted on synthetic calcium hydroxy apatite samples co-doped with 239Pu and carbonate ion. These investigations were carried out to assess the self-irradiation effects in bone and teeth on exposure to plutonium, as calcium hydroxy apatite is the major constituent of bone and teeth. On self-irradiation, in addition to the signal from O- ion arising from the radiolysis of hydroxide ion, EPR signals due to CO2-, PO22- and another signal assigned to surface O- ions were observed in the samples. In freshly quenched gamma irradiated samples, signals from CO3-, O- , PO22- and O2- ions were observed. The EPR signal of O2- ion shows a doublet splitting suggesting that O2- ion gets preferentially stabilized close to Pu4+. The radiation damage due to Pu4+ at Ca2+ sites, in the sample appears to be lower as compared to that due to external gamma-irradiation. Moreover, the alpha-dose in 239Pu doped samples has self-annealing effects. These are attributed to localized radiation damage due to alpha-particles compared to evenly distributed radical ions produced due to gamma-irradiation.

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Cover Journal of Radioanalytical and Nuclear Chemistry
Journal of Radioanalytical and Nuclear Chemistry
Print ISSN:
0236-5731
Online ISSN:
1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation		 1968
Volumes
per Year		 1
Issues
per Year		 12
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)

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