X- and Q-band electron paramagnetic resonance of CO2- in hydroxyapatite single crystals

被引：0

作者：

Vanhaelewyn, GCAM ^{[1
]}

Morent, RA ^{[1
]}

Callens, FJ ^{[1
]}

Matthys, PFAE ^{[1
]}

机构：

[1] State Univ Ghent, Lab Crystallog & Study Solid State, B-9000 Ghent, Belgium

来源：

RADIATION RESEARCH | 2000年 / 154卷 / 04期

关键词：

D O I：

10.1667/0033-7587(2000)154[0467:XAQBEP]2.0.CO;2

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Both X- and Q-band electron paramagnetic resonance (EPR) research has been conducted using slightly carbonated hydroxyapatite (HAp) single crystals after exposure to ionizing radiation. Below a temperature of 90 K, O- and CO2- radicals were detected, whereas at room temperature only CO2- spectra could be observed. The O- ion has previously been investigated in high-purity HAp single crystals, whereas EPR spectra of CO2- in HAp single crystals have not been reported. Both paramagnetic defects exhibit EPR angular variations in planes containing the c axis of the crystal from which spin Hamiltonian parameters were derived. Arguments are given for the presence of two CO2- defects in the irradiated HAp single crystals. (C) 2000 by Radiation Research Society.

引用

页码：467 / 472

页数：6