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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．
The Doppler broadening spectra of 20 metallic elements were measured and compared with the theoretical calculations. The high-momentum part of the CDB spectrum reflects the annihilation of positrons and core electrons. Since the core electrons retain their elemental properties when the atoms make up the material, high-momentum parts of the CDB spectrum can be used to identify elements.