Pulsed neutron imaging using resonance transmission spectroscopy
Pulsed neutron imaging using resonance transmission spectroscopy
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DOI：
10.1016/j.nima.2009.01.124
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发表时间：
2009-06-21
影响因子：
1.4
通讯作者：
Kiyanagi, Yoshiaki
中科院分区：
文献类型：
--
作者：
Sato, Hirotaka;Kamiyama, Takashi;Kiyanagi, Yoshiaki
利用脉冲中子源和飞行时间谱技术，我们正在发展能量选择性中子照相和层析成像技术。中子共振吸收光谱与计算机断层成像（N-RAS/CT）技术，可以无损地获得反映被检体内部核素、密度、温度等物质信息的断层图像。主要的N-RAS/CT是通过检测从吸收中子的核发射的瞬发伽马射线作为中子TOF的函数来执行的。在这种情况下，需要通过用移动狭缝扫描对象来获得位置相关的数据。另一方面，在本文中，我们提出了一种新的N-RAS/CT方法，使用中子透射谱结合二维位置灵敏中子探测器（2d-PSND），这是适用于TOF测量。该方法的最大特点是测量时间短，因为2d-PSND可以一次获得空间信息。为此，我们进行了新的N-RAS/CT实验，以检查其在基于小型加速器的脉冲中子装置上的可行性。(C)2009 Elsevier B. V.保留所有权利。
We are developing the energy-selective neutron radiography and tomography technique by using the pulsed neutron source and the time-of-flight (TOF) spectroscopy. Neutron resonance absorption spectroscopy with computer tomography, N-RAS/CT, can non-destructively give the tomographic image indicating material information such as nuclide, density and temperature inside the object. The primary N-RAS/CT was performed by detecting prompt gamma-rays emitted from nuclei absorbing neutrons as a function of neutron TOF In this case, position dependent data need to be obtained by scanning the object with a moving slit. On the other hand, in this paper, we propose a new N-RAS/CT method using neutron transmission spectroscopy combined with 2-dimensional position sensitive neutron detector (2d-PSND), which is applicable to TOF measurement. The greatest feature of this method is shorter measurement time than the previous one because 2d-PSND can obtain spatial information at once. For this reason, we carried out the new N-RAS/CT experiment to examine its feasibility at the pulsed neutron facility based on the small accelerator. (C) 2009 Elsevier B.V. All rights reserved.