Development of a silicon photodiode-based compact gamma spectrometer using a $$\hbox {Gd}_{{3}} \hbox {Ga}_{{3}} \hbox {Al}_{{2}} \hbox {O}_{{12}}$$:Ce,B single crystal scintillator

Mitra, Pratip; Srivastava, Saurabh; Tyagi, Mohit; Kumar, Amit; Gadkari, S. C.

doi:10.1007/s12034-019-1942-x

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…However, they are bulky and require high baising voltages of a few hundred volts making them unsuitable for large scale deployments. We have earlier developed a GGAG:Ce,B scintillator-PIN photodiode detector based system for gamma spectrometry applications [4]. Since a PIN photodiode does not provide any inherent gain, this detector required a very low noise and high gain pulse processing electronics for counting or spectroscopy of gamma radiation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a SiPM-GGAG:Ce,B scintillator detector for environmental gamma radiation monitoring

Srivastava¹,

Mitra²,

Singh³

et al. 2022

J. Inst.

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A study of a silicon photomultiplier (SiPM) coupled with a GGAG:Ce,B scintillator detector for environmental gamma radiation monitoring is presented in this paper. FLUKA based Monte Carlo simulations were carried out for the optimization of scintillator material and geometry for this application. Based on the simulation study, the dimensions of GGAG:Ce,B scintillator crystal were finalized and the scintillator was prepared. The detector was assembled by optically coupling to a commercially available SiPM. The analog output pulses of the SiPM were amplified by a voltage sensitive amplifier and subsequently counted using a microcontroller. The linearity of the detector response with gamma dose rate was verified using 137Cs standard gamma source. The radiation response of the detector for different gamma energies was investigated using standard 137Cs, 241Am and 60Co sources. The variation of detector sensitivity with SiPM overvoltage was measured for choosing an optimal overvoltage for the SiPM operation. The experimentally observed response of the SiPM-GGAG:Ce,B detector was very linear in the measurement range of 3.5–300 μGy/h with a sensitivity of 2.44 cps/μGy/h. The gamma response study of the detector confirm the suitability of the developed detector for making a compact and low power gamma monitor for environmental gamma radiation monitoring network.

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Section: Introductionmentioning

confidence: 99%

Investigation of a SiPM-GGAG:Ce,B scintillator detector for environmental gamma radiation monitoring

Srivastava¹,

Mitra²,

Singh³

et al. 2022

J. Inst.

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Performance studies of compact GGAG:Ce,B thermal neutron detector coupled to Si-based photosensors

et al. 2021

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Single crystals of Gd 3 Ga 3 Al 2 O 12 :Ce,B were grown and coupled to Si-based photosensors, i.e. avalanche photodiode (APD) and silicon photomultipliers (SiPM), to develop a compact yet efficient thermal neutron detector. The performance of a GGAG:Ce,B/CsI:Tl phoswich coupled to SiPM is also studied for the detection and the discrimination of thermal neutrons in the presence of gamma background. The observed characteristic peaks around 35 and 78 keV corresponding to low-energy X-rays and conversion electrons resulting from the thermal neutron capture are found to be well discriminated from the gamma background.

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A silicon photomultiplier based compact gamma spectrometer for environmental gamma radiation monitoring networks

Srivastava,

Mitra,

Kumar

et al. 2023

Radiation Protection Dosimetry

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In this paper, the details of the development and performance characterisation of a compact, low-power gamma spectrometer for environmental gamma radiation monitoring networks are presented. To reduce the power consumption and the size of the spectrometer, a gamma detector comprising a silicon photomultiplier coupled to a Gd3Ga3Al2O12:Ce,B (GGAG:Ce,B) scintillator has been used for gamma spectrometry. Initially, a Monte Carlo simulation study was carried out to verify the suitability of the 5 mm × 5 mm × 5 mm GGAG:Ce,B crystal for spectrometry of gamma sources in the energy range 60–1332 keV. For minimising the power consumption, the signal processing electronics has been custom designed. This electronics was realised using standard off-the-shelf components to reduce the cost. The developed spectrometer is of size 16 cm × 10 cm × 6 cm, weighs 600 g and consumes 600 mW power. The spectrometer is developed such that it could be directly interfaced with GSM/Xbee for wireless communication with the radiation monitoring networks. The lower-level discriminator threshold of the system is 40 keV and the total electronic noise is <20 keV. The experimentally measured sensitivity of the spectrometer for 137Cs (662 keV) is 2.4 cps/μGy/h at 3.5 V overvoltage. The spectrometer offers excellent linearity over the measured energy range of 60–1332 keV and an energy resolution of ~10% for 662 keV gamma-ray at room temperature.

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Development of a silicon photodiode-based compact gamma spectrometer using a $$\hbox {Gd}_{{3}} \hbox {Ga}_{{3}} \hbox {Al}_{{2}} \hbox {O}_{{12}}$$:Ce,B single crystal scintillator

Cited by 5 publications

References 7 publications

Investigation of a SiPM-GGAG:Ce,B scintillator detector for environmental gamma radiation monitoring

Investigation of a SiPM-GGAG:Ce,B scintillator detector for environmental gamma radiation monitoring

Performance studies of compact GGAG:Ce,B thermal neutron detector coupled to Si-based photosensors

A silicon photomultiplier based compact gamma spectrometer for environmental gamma radiation monitoring networks

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