【作者】 郗传英； 叶邦角； 孔伟； 翁惠民； 周先意； 韩荣典；

【Author】 XiChuanying, YeBangjiao, Kong Wei, WengHuimin, ZhouXianyi, Han RongdianDepartment of Modern Physics, University of Science and Technology of ChinaHefei, Anhui,China, 230026

【机构】 中国科学技术大学近代物理系；

【摘要】 测量了二十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.更多还原

【Abstract】 20 pure elemental metal samples have been studied with coincidence Doppler broadening system(CDB). The results show the relationship between CDB spectra and electronic structure of these samples. The experimental results have been compared to simple theoretical predictions. We show that the high-momentum part of the Doppler-broadening spectra can be used to distinguish different elements and the CDB technique is useful in studying the elemental variations around a defect site.更多还原