Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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The Low-Radiation Dosimetry Application of "tris" Lyoluminescence using Electron Paramagnetic Resonance at Low Temperature

  • Son, Phil-Kook (Department of Advanced Materials Engineering for Information & Electronics, Kyung Hee University) ;
  • Choi, Suk-Won (Department of Advanced Materials Engineering for Information & Electronics, Kyung Hee University) ;
  • Kim, Sung-Soo (Department of Chemical Engineering, Kyung Hee University) ;
  • Gwag, Jin-Seog (Department of Physics, Yeungnam University)
  • Received : 2012.04.05
  • Accepted : 2012.07.07
  • Published : 2012.09.30
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Abstract

We present a method for detecting very weak radiation by analyzing the inner structure of irradiated tris (lyoluminescence) materials using electron paramagnetic resonance (EPR) at low temperature. Organic materials have been looked into for use in emergency dosimetry of inhabitants around radiation accidents. However, this technology has never been applied to imperceptible radiation doses (< 0.5 Gy) because there is no proper method for detecting the change of inner structure of the subject bombed by very weak radiation at room temperature. Our results show that tris materials can be applied as a radiation detectors of very small radiation doses below 0.05 Gray, if EPR is used at low temperature (130 K ${\leq}$ T ${\leq}$ 270 K). The EPR signal intensity from the irradiated-tris sample had barely faded at all after 1 year.

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References

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