MC模拟高纯锗探测器准直器对X射线能谱测量的影响

doi:10.3969/j.issn.1000-1158.2021.02.18

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Abstract To study the influence of different beam-limiting aperture collimators on the measurement results, MCNP5 simulation software was used to establish a high-purity germanium detector model with a collimator, and various parameters of the collimator were used to simulate and analyze the impact of the collimator on the high-purity germanium detector. Measuring the influence of the X-ray energy spectrum to establish the optimal size of the collimator, and provide a certain reference basis for the laboratory to use the high purity germanium detector to measure the X-ray energy spectrum. The transmission equivalent aperture (TEA) collimator index was calculated, the detection efficiency of X-ray measured by HPGe detector was analyzed. The results showed that the collimator with small aperture and thick shield should be selected for the low-energy X-ray energy spectrum measurement with energy less than 80keV, and the collimator with larger aperture should be selected for the medium and high-energy X-ray with energy more than 80keV, so as to avoid the influence of the quality of X-ray energy spectrum due to the generation of small angular scattered rays and lead characteristic lines from the lead collimator.

Key words： metrology X-ray energy spectrum high purity germanium detector collimator TEA MCNP5

Received: 07 August 2020 Published: 18 February 2021

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TB98

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	Articles by authors
	WEN Yu-qin
	ZHAO Rui
	WU Jin-jie
	LAI Wan-chang
	WANG Er-yan

Cite this article:

WEN Yu-qin,ZHAO Rui,WU Jin-jie, et al. MC Simulation of the Effect of High Purity Germanium Detector Collimator on X-ray Energy Spectrum Measurement[J]. Acta Metrologica Sinica, 2021, 42(2): 245-249.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.02.18 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I2/245

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