| 氘氘中子产额铟活化诊断方法 |
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| 引用本文： | 宋仔峰,陈家斌,唐琦,詹夏宇.氘氘中子产额铟活化诊断方法[J].强激光与粒子束,2012,24(5):1165-1168. |
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| 作者姓名： | 宋仔峰 陈家斌 唐琦 詹夏宇 |
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| 作者单位： | 1.中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621 900 |
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| 摘 要： | 提出了活化法测量DD中子产额的实验方法，该方法可提高DD中子产额测量的精度。方法基于铟同位素115In与DD中子的非弹性散射反应，活化反应释放的射线被HPGe探测器记录，根据活化系统标定灵敏度推算出中子产额。分析了探测器记录的活化射线数与中子产额间的关系。介绍了一套活化测量的系统设计。通过蒙特卡罗方法模拟了活化样品出射的射线数与样品厚度的关系，模拟结果表明:样品厚度取为1 cm可兼顾活化效率和测量精度。在加速器上对铟活化样品进行了标定实验，实验结果表明:在聚变中子产额大于2109的实验中可使用铟活化诊断方法，中子产额测量的相对标准误差在10%以内。随着聚变中子产额的不断提高，铟活化测量中子产额的精度可进一步提高。
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| 关 键 词： | DD中子产额 铟活化 实验标定 蒙特卡罗模拟 |
| 收稿时间： | 2011/10/17 |
DD neutron yield diagnosis by indium activation |
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| Song Zifeng
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Chen Jiabin
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Tang Qi
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Zhan Xiayu.DD neutron yield diagnosis by indium activation[J].High Power Laser and Particle Beams,2012,24(5):1165-1168. |
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| Authors: | Song Zifeng Chen Jiabin Tang Qi Zhan Xiayu |
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| Affiliation: | 1.Research Center of Laser Fusion,CAEP,P.O.Box 919-986,Mianyang 621900,China |
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| Abstract: | The measurement of DD neutron yield by activation is presented. This method is based on the inelastic scattering reaction of 115In with DD neutron, and the activated γ spectrum is counted by HPGe detector. The relation between the counts of detected γ rays and the neutron yield is analyzed. The optimal thickness of sample is given by Monte Carlo simulation, which is 1 cm. The entire counting system has been calibrated on the K-400 accelerator. The result shows that the DD neutron measurement by indium activation can be used in the ICF experiment when the neutron yield is above 2×109. The total error of the system is below 10% in this condition. The total error will reduce when the neutron yield is larger. |
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| Keywords: | DD neutron yield indium activation experimental calibration Monte Carlo simulation |
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