Unfolding the measured neutron spectra in the irradiation chamber of the UZrH reactor using iterative method

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• 作者：Shuhuan LIU ; Da CHEN ; Nannan LIU ; A Jingye ; Wenshou ZHANG ; Kai WANG
• 关键词：Pulsed reactor ; Neutron spectra ; Iterative method
• 刊名：Nuclear Science and Techniques
• 出版年：2007
• 出版时间：April 2007
• 年：2007
• 卷：18
• 期：2
• 页码：77-81
• 全文大小：364 K

文摘

In the procedure of neutron fluence measurement in the whole energy range (10¹⁴4eV18 MeV), in the irradiation chamber of a UZrH reactor, the neutron energy spectra are unfolded using the method of minimizing directed divergence and SAND-II, which are used broadly at home and abroad. These methods belong to the iterative methods. In this article, the procedure of the spectra unfolding using the two methods is described in detail. The neutron spectrum distribution unfolded by the two methods agree well with each other. In the end, the major differences of the two iterative methods are compared with each other, and the main factors affecting the accuracy of the spectra unfolding with the iterative method are discussed.