NaI(Tl)闪烁探测器性能随温度变化实验
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国家自然科学基金资助项目(No.11175083);湖南省自然科学基金资助项目(No.2018JJ2314)

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Experimental research on performance of NaI(Tl) scintillation detector with temperature change
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    摘要:

    采用高低温试验方法探究了温度变化对NaI(Tl)闪烁探测器性能及能谱测量的影响,观察能谱并以常温25 °C为基准,计算137Cs的0.662 MeV、60Co源1.173 MeV,1.332 MeV特征峰位道址、γ射线全能峰计数率、能量分辨率在25 °C下相对变化值。结果为:137Cs的0.662 MeV、60Co源1.173 MeV, 1.332 MeV特征峰位道址在0 °C~20 °C范围内基本保持一致,在20 °C~45 °C范围内随温度升高逐渐降低;0.662 MeV和1.173 MeV全能峰计数率随温度变化分别在±5.19%和±4.48%范围内保持一致;3个对应能量分辨率分别在±4.3%范围内随温度变化保持一致。可看出利用γ源作为稳峰源是可行的。

    Abstract:

    In this paper, the effect of temperature change on the performance and energy spectrum measurement of NaI(Tl) scintillation detector was investigated by high and low temperature test method. The energy spectrum was observed on the basis of 25 °C as a benchmark. The calculated values at 25 °C include the characteristic peak path address of 137Cs in 0.662 MeV, 60Co in 1.173 MeV and 1.332 MeV, and the total peak counting rate of Gamma rays, energy resolution. It comes to a conclusion that the characteristic peak path addresses of 137Cs in 0.662 MeV, 60Co in 1.173 MeV and 1.1332 MeV were consistent at 0°C-20°C, while gradually decrease at 20°C-45°C. Total peak counting rate of Gamma rays in 0.662 MeV and 1.173 MeV were consistent within the range of ±5.19% and ±4.48% respectively. The three corresponding energy resolutions were consistent with the temperature changes within the range of ±4.3%。It can be seen that it is feasible to use the γ-ray as a stable peak source.

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常元智,屈国普,赵 越,汪 伦,张文利. NaI(Tl)闪烁探测器性能随温度变化实验[J].太赫兹科学与电子信息学报,2019,17(5):910~913

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  • 收稿日期:2018-12-07
  • 最后修改日期:2019-02-26
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  • 在线发布日期: 2019-11-04
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