Author:
Srivastava S.,Mitra P.,Singh S.K.,Tyagi M.,Kumar A.V.,Topkar A.
Abstract
Abstract
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.
Subject
Mathematical Physics,Instrumentation
Cited by
2 articles.
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