Optimum condition of efficiency functions for HPGe γ-ray detectors in the 121-1408 keV energy range

CHEN Zhi-Lin; SONG Guo-Yang; MU Long; WANG He-Yi; XING Shi-Xiong; GUO Hong-Bo; LIAO Zhen-Xing; CHEN Ping; HUA Sheng

doi:10.1088/1674-1137/34/5/009

Chinese Physics C> 2010, Vol. 34> Issue(5) : 560-564 DOI: 10.1088/1674-1137/34/5/009

Optimum condition of efficiency functions for HPGe γ-ray detectors in the 121-1408 keV energy range

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Abstract：
The optimum condition of three commonly used functions in the Genie 2000 γ spectra analysis software have been studied in the 121—1408 keV energy range. The three functions are applied for fitting the full-energy peak efficiency of the HPGe gamma-ray detector. A detailed procedure to obtain the optimum condition is described. The HPGe detector is calibrated at 11 cm by three radioactive sources of point form (¹⁵²Eu, ¹³⁷Cs, ⁶⁰Co) providing 11 energy peaks. After data processing, results shows that the three functions used in the Genie 2000 gamma spectra analysis software fit best at orders 3—5. Lastly the standard radioactive source ¹³³Ba is chosen to validate the results. Differences between the standard activity of ¹³³Ba and the result obtained from the fitting functions are below 1.5%. Therefore the optimum orders of the three functions used in the Genie 2000 γ spectra analysis software are 3—5 with the 11 energy peaks.

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CHEN Zhi-Lin, SONG Guo-Yang, MU Long, WANG He-Yi, XING Shi-Xiong, GUO Hong-Bo, LIAO Zhen-Xing, CHEN Ping and HUA Sheng. Optimum condition of efficiency functions for HPGe γ-ray detectors in the 121-1408 keV energy range[J]. Chinese Physics C, 2010, 34(5): 560-564. doi: 10.1088/1674-1137/34/5/009

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Received: 2009-06-28
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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

Optimum condition of efficiency functions for HPGe γ-ray detectors in the 121-1408 keV energy range

Corresponding author: CHEN Zhi-Lin,

Received Date: 2009-06-28

Accepted Date: 2009-11-26

Available Online: 2010-05-05

Abstract:

The optimum condition of three commonly used functions in the Genie 2000 γ spectra analysis software have been studied in the 121—1408 keV energy range. The three functions are applied for fitting the full-energy peak efficiency of the HPGe gamma-ray detector. A detailed procedure to obtain the optimum condition is described. The HPGe detector is calibrated at 11 cm by three radioactive sources of point form (¹⁵²Eu, ¹³⁷Cs, ⁶⁰Co) providing 11 energy peaks. After data processing, results shows that the three functions used in the Genie 2000 gamma spectra analysis software fit best at orders 3—5. Lastly the standard radioactive source ¹³³Ba is chosen to validate the results. Differences between the standard activity of ¹³³Ba and the result obtained from the fitting functions are below 1.5%. Therefore the optimum orders of the three functions used in the Genie 2000 γ spectra analysis software are 3—5 with the 11 energy peaks.

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Optimum condition of efficiency functions for HPGe γ-ray detectors in the 121-1408 keV energy range

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