Enhancement of radiation-induced EPR signal in bioapatites

被引：0

作者：

Nosenko, V. V. ^{[1
,2
]}

Vorona, I. P. ^{[1
]}

Lemishko, S., V ^{[1
]}

Golovina, I. S. ^{[1
]}

Yukhymchuk, V. O. ^{[1
]}

Okulov, S. M. ^{[1
]}

Neimash, V. B. ^{[3
]}

Povarchuk, V. Yu ^{[3
]}

Solopan, S. O. ^{[4
]}

Belous, A. G. ^{[4
]}

机构：

[1] Natl Acad Sci Ukraine, V Lashkaryov Inst Semicond Phys, 45 Prosp Nauky, UA-03680 Kiev, Ukraine

[2] Natl Univ Kyiv Mohyla Acad, 2 Skovorody Str, UA-04070 Kiev, Ukraine

[3] Natl Acad Sci Ukraine, Inst Phys, 46 Prosp Nauky, UA-03680 Kiev, Ukraine

[4] Natl Acad Sci Ukraine, V Vernadsky Inst Gen & Inorgan Chem, 32-34 Academician Palladin Ave, UA-03142 Kiev, Ukraine

来源：

SEMICONDUCTOR PHYSICS QUANTUM ELECTRONICS & OPTOELECTRONICS | 2022年 / 25卷 / 02期

关键词：

EPR; paramagnetic defect; bioapatite; dielectric insert; TOOTH ENAMEL; CO2-RADICALS; DOSIMETRY;

D O I：

10.15407/spqeo25.02.173

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Amplification of a dosimetric EPR signal in mineralized biological materials available in limited quantities has been demonstrated in this paper. Powders of irradiated enamel, dentin, and bone tissue were placed into silica ampoules with the outer diameter close to 1.4 mm. To amplify the signal, the dielectric insert in the form of cylinder with the outer radius 2.85 mm, the inner radius 0.75 mm, and the height 1.85 mm made of a high-kappa and low-loss ceramic material BaTi4O9 + 8.5% ZnO has been used. It has been shown that maximum signal amplification (about an order of magnitude) has been achieved when the sample is completely inserted into this dielectric. It has been found that the line shape of the dosimetric signal is not distorted, if using the dielectric insert. Decomposition of the amplified EPR spectra allowed us to determine the relative contribution of two types of CO2- radicals to the dosimetric signal, which coincides with the literature data.

引用

页码：173 / 178

页数：6

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