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Scintillator-Based Electronic Personal Dosimeter for Mobile Application

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Smart Sensors at the IoT Frontier

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Abstract

A noble electronic personal dosimeter (EPD) can simultaneously measure the energy spectrum and the personal dose rate in radiation-exposed environment. This device is composed of a compact radiation sensor to detect gamma-ray, an integrated circuit of preamplifier and peak holder, and a software to calculate the personal dose from the measured spectrum, finally a smartphone application software to show the calculated personal dose in a mobile phone. The CsI(Tl)-coupled PIN diode is used as a compact spectroscopic radiation sensor to measure the energy spectrum for the radioisotope identification or the activity analysis. To optimally design the size of the compact radiation sensor to be used as an accessary of mobile personal devices, we determined a guideline such that the sensor must satisfy the international criteria of angular response as well as have the maximum value of a figure of merit which is a product of the geometric detection efficiency and the energy resolution. The energy spectrum must be converted to the personal dose or dose rate by a much simpler dose conversion algorithm, called a median bin approximation, without using a typical time-consuming deconvolution process typically used to identify the incident gamma energy. The accuracy of the algorithm depending on the gamma energy and gamma fluence was estimated by the difference rate. The average difference rate in the interested gamma energy ranging from 20 keV to 1.5 MeV was measured to be 17.3% experimentally using radioisotope check sources, and the difference rate becomes negligible over the fluence level of 103 γ – ray/0.09 cm2. So, the possibility to devise the electronic personal dosimeter with a single spectroscopy sensor for the dual purpose, dosimetry and spectroscopy, was confirmed in this study.

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Acknowledgment

This work was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT and Future Planning as Global Frontier Project.

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Authors and Affiliations

  1. Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea

    Gyuseong Cho, Hyunjun Yoo, Daehee Lee, Jonghwan Park & Hyunduk Kim

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  1. Gyuseong Cho
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  2. Hyunjun Yoo
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  3. Daehee Lee
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  4. Jonghwan Park
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  5. Hyunduk Kim
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Correspondence to Gyuseong Cho .

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Editors and Affiliations

  1. Kyushu University, Fukuoka, Japan

    Hiroto Yasuura

  2. Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea (Republic of)

    Chong-Min Kyung

  3. Circuits and Systems Division, Tsinghua University, Beijing, Beijing, China

    Yongpan Liu

  4. National Tsing Hua University, Hsinchu, Taiwan, Taiwan

    Youn-Long Lin

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Cho, G., Yoo, H., Lee, D., Park, J., Kim, H. (2017). Scintillator-Based Electronic Personal Dosimeter for Mobile Application. In: Yasuura, H., Kyung, CM., Liu, Y., Lin, YL. (eds) Smart Sensors at the IoT Frontier . Springer, Cham. https://doi.org/10.1007/978-3-319-55345-0_8

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  • DOI: https://doi.org/10.1007/978-3-319-55345-0_8

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-55344-3

  • Online ISBN: 978-3-319-55345-0

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