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LaBr_3 detector sampling container gaseous beta to decay source detection efficiency

Author: LiuYueLong
Tutor: QuGuoPu
School: Nanhua University
Course: Nuclear Technology and Applications
Keywords: LaBr3 Sampling container beta ~ Detection efficiency
CLC: TL812
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 0
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Abstract


Lanthanum bromide detector is 2000 , after the emergence of the new halide scintillator detectors, the basic overall performance beyond the now used in industrial , environmental protection and other fields the most widely used of the NAI ( Tl ) crystal detector , the most promising future Alternate NaI (Tl) crystal detector . The MCNPX simulation using Monte Carlo software calculated the lanthanum bromide detector for different types , different volumes of the same type , the same volume of the same type the ratio of the radius of the sample container beta - source annihilation gamma photon detection efficiency and counting rate , different sizes , different types of detectors on the same sample container detection efficiency of the detector in the same sample container , but at a different depth detection efficiency were calculated. According to the results , select the best type and volume of the sample container . Then Marinelli Beaker container ( MB the container ) , for example , the establishment of mathematical geometric model , the use of numerical methods to calculate the detection efficiency , the calculation process in the C programming can be achieved , and were compared with results obtained with MCNPX simulation results with the numerical method . The comparison results showed that the two simulation results are consistent within a certain error range , the calculation results of the experimental scale detector to provide a reference beta ... source detection efficiency . The last two calculation methods based on the MCNPX software simulation and numerical calculation , make full use of the C Builder has a visual development environment , designed detector the in beta ~~ MB container annihilation photon the passive efficiency calibration software , parameters and results can edit the window visual input and output , greatly reducing the the theoretical calculation lanthanum bromide detectors MB containers beta ... source detection efficiency of working time and effort .

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CLC: > Industrial Technology > Nuclear technology > Particle detection,radiation detection and nuclear instrumentation > Radiation detection technology and instrumentation > Flicker detection technology and equipment
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