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Coincidence Doppler Broadening Study of Elemental Metals
Chuan-ying Xi,Bang-jiao Ye,Wei Kong,Hui-min Weng*,Xian-yi Zhou,Rong-dian Han
Author NameAffiliationE-mail
Chuan-ying Xi Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China  
Bang-jiao Ye Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China  
Wei Kong Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China  
Hui-min Weng* Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China wenghm@ustc.edu.cn 
Xian-yi Zhou Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China  
Rong-dian Han Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China  
Abstract:
Twenty pure elemental metal samples have been studied with a coincidence Doppler broadening system (CDB). The results show the relationship between the CDB spectra and the electronic structure of these samples. The experimental results are compared to simple theoretical predictions, which show that the high-momentum part of the Doppler-broadening spectra can be used to distinguish different elements.
Key words:  Positron annihilation, Coincidence Doppler broadening, Metal, Elemental specificity
FundProject:
金属元素的正电子鉴别技术
郗传英,叶邦角,孔伟,翁惠民*,周先意,韩荣典
摘要:
测量了20种金属元素的符合多普勒展宽谱,并与理论计算的结果比较. CDB谱的高动量部分反映了正电子与核心电子的湮灭,由于核心电子在原子组成材料时仍然保留了元素特性, CDB谱的高动量部分可以用来鉴别元素.
关键词:  正电子湮灭, 符合多普勒展宽, 金属, 元素鉴别
DOI:10.1360/cjcp2006.19(3).203.4
分类号: