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

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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
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 shu
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Received: 2009-06-28
Revised: 2009-11-26
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Optimum condition of efficiency functions for HPGe γ-ray detectors in the 121-1408 keV energy range

    Corresponding author: CHEN Zhi-Lin,

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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