Development and Performance Characteristics of Personal Gamma Spectrometer for Radiation Monitoring Applications

Park, Hye Min; Joo, Koan Sik

doi:10.3390/s16060919

Cited by 11 publications

(7 citation statements)

References 7 publications

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“…Because the detector unit generates a pulse of 1 V or more when radiation is incident on the detector unit, which is much larger than the signal (∼200 mV) generated by the conventional PMT-based detector, accurate radiation detection is possible without amplification and shaping. Rather, using a preamplifier and shaping amplifier for unnecessary amplification and shaping increases the signal noise due to impedance mismatch and hinders the accurate detection of radiation [8]. Therefore, in this study, the signal generated by the detector unit is not amplified and shaped, but it is transmitted to a multichannel analyzer (MCA) for nuclide analysis and transferred to micro control unit (MCU) for the radiation count.…”

Section: Methodsmentioning

confidence: 99%

Feasibility of miniature radiation portal monitor for measurement of radioactivity contamination in flowing water in pipe

2018

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In this study, a miniature radiation portal monitor and an operation program were developed and tested for monitoring radioactive contamination of water caused by nuclear power plant accidents or unplanned release of radioactive materials. In order to set the optimum voltage of the detector, the voltage was increased by 1 V and the detection efficiency was measured. It was confirmed that the detector had a stable count and a high signal-to-noise ratio at 60 V. The detector response, gamma-ray energy spectrum, and energy linearity were tested using the detector with an applied voltage of 60 V. The R-square value of the detector response based on the intensity was 0.9980 and the R-square value of the channel linearity based on the energy was 0.9851, which indicates the detection characteristics to be very good. In addition, the system showed good resolution characteristics in which the gamma-ray emission energy 122 keV of the 57 Co had an energy resolution of 16.02%, 662 keV of the 137 Cs spectrum had 4.88%, and 1,332 keV of the 60 Co had 2.02%. Based on the results from this study, it is determined that continuous research work may contribute in reducing the radioactive exposure caused by contamination of groundwater and drinking water in radioactive spill accidents. K: Dosimetry concepts and apparatus; Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators) 1Corresponding author.

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Section: Methodsmentioning

confidence: 99%

Feasibility of miniature radiation portal monitor for measurement of radioactivity contamination in flowing water in pipe

2018

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“…A driver circuit was designed and fabricated instead of using charge-sensitive preamplifiers and shaping amplifiers. This design took advantage of the high electron gain and voltage signal output characteristics of SiPMs [14]. Figure 3 displays a 1.3-V pulse signal with a pulse width of approximately 5 μs, which was measured from the driver circuit using a Cs-137 source.…”

Section: Jinst 18 P05019 2 Materials and Methodsmentioning

confidence: 99%

Development of a radiation detector using a silicon photomultiplier and large Ce-doped Gd-Al-Ga-grant scintillator for gamma spectroscopy observations of radioactivation in a linear accelerator

Park

Kim

2023

J. Inst.

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In this study, a radiation detector based on a silicon photomultiplier (SiPM) and large Ce-doped Gd-Al-Ga-grant (Ce:GAGG) scintillator was developed for the gamma spectroscopy observations of radioactivation from linear accelerators (LINACs). The calibration of the detector demonstrated a high energy resolution of 15.89% at 122 keV (gamma-ray emission energy of Co-57), 7.04% at 356 keV (gamma-ray emission energy of 133Ba), 6.17% at 511 keV (gamma-ray emission energy of Na-22), and 5.39% at 662 keV (gamma-ray emission energy of Cs-137). These results indicate that the detector employing a larger Ce:GAGG scintillator provides a higher detection efficiency while maintaining superior energy resolution compared to conventional radiation detectors that use smaller Ce:GAGG scintillators. Furthermore, the energy spectrum measurement of the LINAC revealed detection of neutron and gamma peaks of W-187 and Mn-56, as well as annihilation peaks. Although the energy resolution of the detector was inferior compared to an HPGe detector, it was able to measure similar energy peaks. Therefore, the radiation detector developed in this study, which is characterized by its low cost, decent energy resolution, and high detection efficiency, may be useful for obtaining radiation measurements during the disposal of LINACs.

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“…The input voltage for SiPM is 56.5 V. Charge-sensitive preamplifiers were not used, and only driver circuits were employed. This design leveraged the high electron gain and voltage signal output characteristics of SiPMs [24]. Gamma-ray spectral analysis was performed using an MCA8000D (manufactured by Amptek Inc) with 8k channels.…”

Section: Methodsmentioning

confidence: 99%

Feasibility of SiPM and CsI(Tl) based radiation detector with light guide for measurement of radioactivation in a linear accelerator

Kim,

Park

2023

J. Inst.

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In this work, a prototype radiation detector was developed using SiPM, a large-sized CsI(Tl) scintillator, and various lengths of light guides, and its performance was evaluated. The conducted studies show that the tested prototype exhibited an enhanced energy resolution improved energy resolution when a 20 mm light guide was used, with respect to the case in which no light guide was employed. Additionally, the radiation detector demonstrated higher detection efficiency compared to other radiation detectors fabricated in this work. The radiation detector prototype under test and equipped with a 20 mm light guide, was used to perform a series of LINAC radioactivation measurements. These measurements resulted in the successful determination of the gamma energy peaks corresponding to W-187 and Mn-56, alongside the accurate measurement of the annihilation peak. These results suggest that the radiation detector employing a light guide for LINAC radioactivation measurements could be a viable alternative to conventional HPGe detectors or scintillation detectors without light guides.

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Development and Performance Characteristics of Personal Gamma Spectrometer for Radiation Monitoring Applications

Cited by 11 publications

References 7 publications

Feasibility of miniature radiation portal monitor for measurement of radioactivity contamination in flowing water in pipe

Feasibility of miniature radiation portal monitor for measurement of radioactivity contamination in flowing water in pipe

Development of a radiation detector using a silicon photomultiplier and large Ce-doped Gd-Al-Ga-grant scintillator for gamma spectroscopy observations of radioactivation in a linear accelerator

Feasibility of SiPM and CsI(Tl) based radiation detector with light guide for measurement of radioactivation in a linear accelerator

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