کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1885410 | 1043412 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermally stimulated transformation of the EPR spectra in γ-irradiated bone tissue
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
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چکیده انگلیسی
γ-irradiated bone tissue annealed at different temperatures is studied by EPR. In powder samples the annealing-induced changes of the EPR spectra are mainly determined by sharp growth of a signal caused by the products of thermal decay of an organic component in the tissue. This signal considerably complicates the analysis of the EPR spectrum shape for the annealed samples. On the other hand, in the spectra of the plates of bone tissue a change in the lineshape of the EPR signal from CO2â radicals after annealing is more pronounced than in powder, and it is attributed to the change in the contributions from axial and orthorhombic CO2â radicals. The analysis of different radicals concentrations vs. annealing temperature revealed above 210 °C the temperature-induced transformation of orthorhombic CO2â radicals into axial ones in bone tissue which (together with organic component) is responsible for the changes of EPR lineshape at annealing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Measurements - Volume 44, Issue 3, March 2009, Pages 239-242
Journal: Radiation Measurements - Volume 44, Issue 3, March 2009, Pages 239-242
نویسندگان
V.V. Rudko, I.P. Vorona, N.P. Baran, S.S. Ishchenko,