Numerical Simulations on Efficiency and Measurement of Capabilities of BGO Detectors for High Energy γ Ray

WEN Wan-Xin; JIN Gen-Ming

Chinese Physics C> 2002, Vol. 26> Issue(11) : 1178-1183

Numerical Simulations on Efficiency and Measurement of Capabilities of BGO Detectors for High Energy γ Ray

WEN Wan-Xin ^, ,
JIN Gen-Ming

Institute of Modern Physics, CAS, Lanzhou 730000, China2 Nuclear Medicine School Soochow University, Suzhou 215007, China

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Abstract：
The energy resolution and time resolution of two φ75×100 BGO (bithmus germanate) detectors for high energy γ ray newly made were measured with ¹³⁷Cs and ⁶⁰Co resources. The two characteristic γ rays of high energy emitted from the thermal neutron capture of germanium in BGO crystal were used for the energy calibration of γ spectra. The intrinsic photopeak efficiency, single escape probability and double escape probabilities of BGO detectors in photon energy range of 4-30MeV are numerically calculated with GEANT code. The real count response and count ratio of the uniformly distributed incident photons in energy range of 0-30MeV are also calculated. The distortion of γ spectra caused by the photon energy loss extension to lower energy in detection medium is discussed.

References

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WEN Wan-Xin and JIN Gen-Ming. Numerical Simulations on Efficiency and Measurement of Capabilities of BGO Detectors for High Energy γ Ray[J]. Chinese Physics C, 2002, 26(11): 1178-1183.

WEN Wan-Xin and JIN Gen-Ming. Numerical Simulations on Efficiency and Measurement of Capabilities of BGO Detectors for High Energy γ Ray[J]. Chinese Physics C, 2002, 26(11): 1178-1183. shu

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Received: 2001-12-29
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

Numerical Simulations on Efficiency and Measurement of Capabilities of BGO Detectors for High Energy γ Ray

WEN Wan-Xin ^,
JIN Gen-Ming

Corresponding author: WEN Wan-Xin,

Institute of Modern Physics, CAS, Lanzhou 730000, China2 Nuclear Medicine School Soochow University, Suzhou 215007, China

Received Date: 2001-12-29
Accepted Date: 1900-01-01
Available Online: 2002-11-05

Abstract: The energy resolution and time resolution of two φ75×100 BGO (bithmus germanate) detectors for high energy γ ray newly made were measured with ¹³⁷Cs and ⁶⁰Co resources. The two characteristic γ rays of high energy emitted from the thermal neutron capture of germanium in BGO crystal were used for the energy calibration of γ spectra. The intrinsic photopeak efficiency, single escape probability and double escape probabilities of BGO detectors in photon energy range of 4-30MeV are numerically calculated with GEANT code. The real count response and count ratio of the uniformly distributed incident photons in energy range of 0-30MeV are also calculated. The distortion of γ spectra caused by the photon energy loss extension to lower energy in detection medium is discussed.