Gamma Sensitivities of Compton Detector with Relatively Permanent Vacuum Atmosphere

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Gamma Sensitivities of Compton Detector with Relatively Permanent Vacuum Atmosphere

更新时间：2025-07-09

- Gamma Sensitivities of Compton Detector with Relatively Permanent Vacuum Atmosphere
- Vol. 43, Issue 3, Pages: 70-73(2009)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 西北核技术研究所,西安,710024
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL812.6
- Online First：10 March 2009，
  
  Published：2009
- 稿件说明：
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Gamma Sensitivities of Compton Detector with Relatively Permanent Vacuum Atmosphere[J]. 2009, 43(3): 70-73.
DOI：

Gamma Sensitivities of Compton Detector with Relatively Permanent Vacuum Atmosphere[J]. 2009, 43(3): 70-73. DOI：

摘要

针对强流脉冲γ射线探测

研制了厚入射窗结构真空康普顿探测器

并在

Co辐照装置上

准直孔径为40 mm的条件下

对2套样品探测器灵敏度进行了测量

得到了1.25 MeV的γ射线灵敏度

实验值分别为4.65×10

-22

C/MeV和4.59×10

-22

C/MeV.该实验值与蒙特卡罗程序MCNP的计算值(4.70×10

-22

C/MeV)相比

误差范围一致

在0.5～3.0 MeV能量区间

探测灵敏度的能量响应变化小于20%.实验证明:该探测器比薄窗结构真空康普顿探测器的灵敏度提高了60%

克服了薄窗探测器封装加工和静态真空保持的困难; 保存使用期可达2年以上

达到了相对永久密封的目的

可应用于粒子注量率为10

-2

·s

-1

以上的强流脉冲γ射线测量.

Abstract

A newly designed vacuum Compton diode detector with a thick incident window was developed and experiment was conducted to measure the sensitivity of the two present detectors in this study. For 1.25 MeV Gamma ray and a collimating diameter of 40 mm

the absolute sensitivity measured was 4.65×10

-22

C/MeV and 4.59×10

-22

C/MeV

respectively

while the sensitivity calculated was 4.70×10

-22

C/MeV using the MCNP code. In the energy range of 0.5-3.0 MeV

the variation of sensitivity was less than 20%. The sensitivity of the detector was about 60% higher than that of the vacuum Compton detector with a thin incident window. Our results indicate that

the performance of the present detector will be steady in two years and it can be used in the detection of intense pulsed gamma with fluence of 10

-2

·s

-1

关键词

Keywords

references

刘庆兆. 脉冲辐射场诊断技术[M].北京:科学出版社,1994.

STEVENS J. Design and characterization of an absolute gamma-ray detector, EGG1183-2288 [R]. Santa Barbara, California, USA: EG G Inc., 1972.

EBERT P J, LAUZON A F. Vacuum diode detector for measuring high intensity gamma-ray flux [J]. Review of Scientific Instrument, 1967, 38(12):1747-1752.

OUYANG Xiaoping. ICI detector for measuring gamma-ray fluxes in mixed gamma-neutron fields[J]. HEP NP, 2006, 30(3):228-231.

MAY M T, CLANCY T, FITTINGHOFF D, et al. Reconstitution of low bandwidth reaction history, UCRL-TR-210578 [R].Livermore, California,USA: LLNL, 2005.

HSU H, LEE H. Monte Carlo calculations of the vacuum compton detectors sensitivities [J]. IEEE Transactions on Nuclear Science, 1989,36(6):1926-1930.

BRIESMEISTER J B. MCNP-a general Monte Carlo N-particle transport code, LA-12625-M-Manual [R]. Oak Ridge,Tennessee, USA: Radiation Safety Information Computational Center, 1998.

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