THE RESPONSE OF A 3×3 BGO DETECTOR ARRAY TO 0.5—21MeV PHOTONS

GU Yi-Fan; HE Jing-Tang; WANG Mao-Zi; ZHU Guo-Yi; YE Zong-Yuan; YUAN Guan-Jun; YU Pan-Shui; YANG Chun-Xiang

Chinese Physics C> 1987, Vol. 11> Issue(1) : 16-23

THE RESPONSE OF A 3×3 BGO DETECTOR ARRAY TO 0.5—21MeV PHOTONS

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Abstract：
An array of 9 BGO crystals of 20×20×200mm³ equipped with photomultiplier readout was assembled and tested. Radioactive γ and neutron sources, (p,γ) reactions by low energy protons from Van de Graaff accelerator and (n,γ) reactions by thermal neutrons from nuclear reactor were employed to produce photons in the energy range from 0.5 to 21MeV. The energy response of the array is shown to be linear over the whole range. Data on the energy resolution follow an E^1/2 dependence at low energies, and deviate from it at 4.43MeV and higher energies. Results from the lateral energy deposition of showers were compared with the predictions of the Monte Carlo simulation and found to be in good agreement. Our study demonstrates the feasibility of calibration and monitoring of BGO electromagnetic calorimeter by means of radioactive sources and low energy (p,γ) reactions.

References

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Y. F. Gu, Proc. International Workshop on Bismuth Germanate, Princeton University, ed. C. Newman-Hol-mes (1982) p, 96,[2] 何景棠、顾以藩、何崇落、沈炳孚, 高能物理与核物理, 7(I983), 766.[3] 王住仔等, 高能物理与核物理, 10(1986), 1,[4] D. M. Drake et al., Nucl. Instr, and Meth., 188(1981), 313.[5] M. Cavalli-Sforza et al., Proc. International Conference on Instrumentation for Oolliding Beam Physics,SLAC-Report 250(1982), p. 216.[6] S. A. Wender, Proc. International Workshop on Bismuth Germanate, Princeton University, ed. C. New-man-Holmes (1982) p.376.[7] 李景文等, 原子核物理, 6(I984), 15.[8] F. James and M. Roos, Comp. Phys. Comm., 10(1975), 343.[9] R. Brun et al., GEANT User's Guide, CERN DD/EE/84-I (Feb: I985).[10] L3实验组通讯.[11] G. I. Kirkbride et al., IEEE Trans. Nucl. Part. Science, Vol. NS-26 N. 1 (1979), 1537.[12] J, A, Bakken et al., Nucl. Instr. and Meth., 228 (1985), 294.

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GU Yi-Fan, HE Jing-Tang, WANG Mao-Zi, ZHU Guo-Yi, YE Zong-Yuan, YUAN Guan-Jun, YU Pan-Shui and YANG Chun-Xiang. THE RESPONSE OF A 3×3 BGO DETECTOR ARRAY TO 0.5—21MeV PHOTONS[J]. Chinese Physics C, 1987, 11(1): 16-23.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

THE RESPONSE OF A 3×3 BGO DETECTOR ARRAY TO 0.5—21MeV PHOTONS

Corresponding author: GU Yi-Fan,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1987-02-05

Abstract: An array of 9 BGO crystals of 20×20×200mm³ equipped with photomultiplier readout was assembled and tested. Radioactive γ and neutron sources, (p,γ) reactions by low energy protons from Van de Graaff accelerator and (n,γ) reactions by thermal neutrons from nuclear reactor were employed to produce photons in the energy range from 0.5 to 21MeV. The energy response of the array is shown to be linear over the whole range. Data on the energy resolution follow an E^1/2 dependence at low energies, and deviate from it at 4.43MeV and higher energies. Results from the lateral energy deposition of showers were compared with the predictions of the Monte Carlo simulation and found to be in good agreement. Our study demonstrates the feasibility of calibration and monitoring of BGO electromagnetic calorimeter by means of radioactive sources and low energy (p,γ) reactions.