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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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GROWTH OF LARGE SINGLE CRYSTAL Cu FOR NEUTRON MONOCHROMATOR USE
中子单色器用大尺寸Cu单晶的生长
XUE Bai, LIU Jun Deportment of Physfcs, University of Science, Technology of China, Hefei, ZHANG Taiyong, ZHENG Zhaobo University of Science, Technology of China, Hefei,
薛白, 刘军, 张泰永, 郑兆勃
Keywords: copper,single crystal growth,neutron monochromator,Bridgman-Stockbarer method
铜,单晶生长,中子单色器,Bridgman-stockbarer方法
Abstract:
1 引言目前热中子散射实验多采用核反应堆做中子源,从核反应堆引出的中子束是一连续谱,为了获得实验用的单色中子束,一般采用单晶衍射的方法。经常用作中子单色器的晶体有Si,Ge,Pb,热解石墨和Cu等。单晶衍射获得的单色束波长λ=2d_(HKL)sinθ,单色束的波长分辨率面△λ/λ∝ctgθ,反射面间距小的Cu单晶在获得同佯波长的单色束时,Bragg角θ大,从而分辨率高(即△λ/λ数值小);另外峰值强度正比于相干散 Full-Text
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