Abstract
In order to improve the accuracy of the tooth enamel EPR dosimetry method, EPR spectra recording conditions were optimized. The uncertainty of dose determination was obtained as the mean square deviation of doses, determined with the use of a spectra deconvolution program, from the nominal doses for ten enamel samples irradiated in the range from 0 to 500 mGy. The spectra were recorded at different microwave powers and accumulation times. It was shown that minimal uncertainty is achieved at the microwave power of about 2 mW for a used spectrometer JEOL JES-FA100. It was found that a limit of the accumulation time exists beyond which uncertainty reduction is ineffective. At an established total time of measurement, reduced uncertainty is obtained by averaging the experimental doses determined from recorded spectra following intermittent sample shaking and sample tube rotation, rather than from one spectrum recorded at longer accumulation time. The effect of sample mass on the spectrometer's sensitivity was investigated in order to find out how to make appropriate corrections.
| Original language | English |
|---|---|
| Pages (from-to) | 435-442 |
| Number of pages | 8 |
| Journal | Journal of Radiation Research |
| Volume | 46 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2005 |
| Externally published | Yes |
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Keywords
- Dose determination
- EPR spectroscopy
- Tooth enamel
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology
- Radiation
Cite this
Tooth enamel EPR dosimetry : Optimization of EPR spectra recording parameters and effect of sample mass on spectral sensitivity. / Zhumadilov, Kassym; Ivannikov, Alexander; Skvortsov, Valeriy; Stepanenko, Valeriy; Zhumadilov, Zhaxybay; Endo, Satoru; Tanaka, Kenichi; Hoshi, Masaharu.
In: Journal of Radiation Research, Vol. 46, No. 4, 2005, p. 435-442.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tooth enamel EPR dosimetry
T2 - Optimization of EPR spectra recording parameters and effect of sample mass on spectral sensitivity
AU - Zhumadilov, Kassym
AU - Ivannikov, Alexander
AU - Skvortsov, Valeriy
AU - Stepanenko, Valeriy
AU - Zhumadilov, Zhaxybay
AU - Endo, Satoru
AU - Tanaka, Kenichi
AU - Hoshi, Masaharu
PY - 2005
Y1 - 2005
N2 - In order to improve the accuracy of the tooth enamel EPR dosimetry method, EPR spectra recording conditions were optimized. The uncertainty of dose determination was obtained as the mean square deviation of doses, determined with the use of a spectra deconvolution program, from the nominal doses for ten enamel samples irradiated in the range from 0 to 500 mGy. The spectra were recorded at different microwave powers and accumulation times. It was shown that minimal uncertainty is achieved at the microwave power of about 2 mW for a used spectrometer JEOL JES-FA100. It was found that a limit of the accumulation time exists beyond which uncertainty reduction is ineffective. At an established total time of measurement, reduced uncertainty is obtained by averaging the experimental doses determined from recorded spectra following intermittent sample shaking and sample tube rotation, rather than from one spectrum recorded at longer accumulation time. The effect of sample mass on the spectrometer's sensitivity was investigated in order to find out how to make appropriate corrections.
AB - In order to improve the accuracy of the tooth enamel EPR dosimetry method, EPR spectra recording conditions were optimized. The uncertainty of dose determination was obtained as the mean square deviation of doses, determined with the use of a spectra deconvolution program, from the nominal doses for ten enamel samples irradiated in the range from 0 to 500 mGy. The spectra were recorded at different microwave powers and accumulation times. It was shown that minimal uncertainty is achieved at the microwave power of about 2 mW for a used spectrometer JEOL JES-FA100. It was found that a limit of the accumulation time exists beyond which uncertainty reduction is ineffective. At an established total time of measurement, reduced uncertainty is obtained by averaging the experimental doses determined from recorded spectra following intermittent sample shaking and sample tube rotation, rather than from one spectrum recorded at longer accumulation time. The effect of sample mass on the spectrometer's sensitivity was investigated in order to find out how to make appropriate corrections.
KW - Dose determination
KW - EPR spectroscopy
KW - Tooth enamel
UR - http://www.scopus.com/inward/record.url?scp=33144458947&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33144458947&partnerID=8YFLogxK
U2 - 10.1269/jrr.46.435
DO - 10.1269/jrr.46.435
M3 - Article
VL - 46
SP - 435
EP - 442
JO - Journal of Radiation Research
JF - Journal of Radiation Research
SN - 0449-3060
IS - 4
ER -