Energy calibration of a BC501A liquid scintillator using a γ-γ coincidence technique

YAN Jie; LIU Rong; LI Cheng; JIANG Li; LU Xin-Xin; ZHU Tong-Hua

doi:10.1088/1674-1137/34/7/012

Chinese Physics C> 2010, Vol. 34> Issue(7) : 993-997 DOI: 10.1088/1674-1137/34/7/012

Energy calibration of a BC501A liquid scintillator using a γ-γ coincidence technique

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Abstract：
An accurate energy calibration of a BC501A liquid scintillator by means of Compton scattering of γ-rays is described. The energy resolution and the position of the Compton edge have been precisely determined using a γ-γ coincidence technique and fitting the coincidence spectrum with a Gaussian function superimposed on a quadratic polynomial for the
background. The position of the Compton edge relative to the position of the maximum and the half height of the distribution in dependence on the relevant energy resolution is discussed in detail. The results indicate that the maximum energy of the recoil Compton electron does not occur at the half height distribution but at 0.90±0.05 of the maximum height in the energy range considered. The energy resolution varies from 15.6% to 8.02% for electrons in the energy region from 0.5 MeV to 3 MeV.

References

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YAN Jie, LIU Rong, LI Cheng, JIANG Li, LU Xin-Xin and ZHU Tong-Hua. Energy calibration of a BC501A liquid scintillator using a γ-γ coincidence technique[J]. Chinese Physics C, 2010, 34(7): 993-997. doi: 10.1088/1674-1137/34/7/012

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Received: 2009-08-28
Revised: 2009-10-09

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Energy calibration of a BC501A liquid scintillator using a γ-γ coincidence technique

Corresponding author: YAN Jie,

Received Date: 2009-08-28

Accepted Date: 2009-10-09

Available Online: 2010-07-05

Abstract:

An accurate energy calibration of a BC501A liquid scintillator by means of Compton scattering of γ-rays is described. The energy resolution and the position of the Compton edge have been precisely determined using a γ-γ coincidence technique and fitting the coincidence spectrum with a Gaussian function superimposed on a quadratic polynomial for the
background. The position of the Compton edge relative to the position of the maximum and the half height of the distribution in dependence on the relevant energy resolution is discussed in detail. The results indicate that the maximum energy of the recoil Compton electron does not occur at the half height distribution but at 0.90±0.05 of the maximum height in the energy range considered. The energy resolution varies from 15.6% to 8.02% for electrons in the energy region from 0.5 MeV to 3 MeV.

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Energy calibration of a BC501A liquid scintillator using a γ-γ coincidence technique

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