Energy dependence of EPR signal in synthetic and biological hydroxyapatite irradiated with photons
Energy dependence of EPR signal in synthetic and biological hydroxyapatite irradiated with photons
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DOI：
10.1093/oxfordjournals.rpd.a032789
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发表时间：
1999-01-01
影响因子：
1
通讯作者：
Barbosa, RA
中科院分区：
文献类型：
--
作者：
de Oliveira, LM;de Jesus, EF;Barbosa, RA
用Cs-137，d Co-60在47 keV至1.25 MeV范围内的X射线和伽马射线照射合成a型碳酸磷灰石和搪瓷样品。利用电子顺磁共振（EPR）研究了两种体系中辐射诱导的CO2自由基的能量依赖性响应。合成磷灰石和牙釉质在58 ~ 1250 keV范围内无能量依赖性。结果与文献报道的骨骼和牙釉质中诱导的相同自由基的能量依赖性进行了比较。
Synthetic A-type carbonated apatite and enamel samples were irradiated using X rays and gamma rays of Cs-137,d Co-60 in the range of 47 keV to 1.25 MeV. The energy-dependent response of CO2- radicals induced by radiation in both systems is studied using electron paramagnetic resonance (EPR). No energy dependence was verified for synthetic apatites and enamel in the range of 58 to 1250 keV. The results are compared with the energy dependence of the same radicals induced in bones and enamel reported in the literature.