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编辑同志: 贵刊1982年第4期发表的郭伽同志“质量分离离子动能谱”一文,文中有些提法似有不妥,值得商榷。一、关于亚稳离子作者在“原理”的第二段里,有关尼尔型双聚焦质谱仪器中亚稳离子的检测,作了如下的叙述:“如果亚稳离子在电场区和磁场区内分解,由于碎片离子的动能和质量比母离子的小,受到电场或磁场的偏转作用大,这些碎片离子不能到达检测器。但是如果亚稳离子在无场区发生分解,后面的作用场对所有的碎片离子都能产生聚焦作用,使碎片离子到达检测器,形成一
Editor’s Comrade: You published the fourth issue in 1982, Comrade Guo Jia “mass separation of ion kinetic energy” article, some of the article seems to be inappropriate, is debatable. I. About Stable Ion In the second paragraph of “Principles”, the detection of metastable ions in the Neil double focusing mass spectrometer has been described as follows: "If the metastable ions are in the electric field and the magnetic field Due to the large kinetic energy and mass of the fragment ions, which are smaller than those of the parent ions, the fragment ions can not reach the detector due to the large deflection of the electric field or the magnetic field. However, if the metastable ions are decomposed in the absence of the field zone, Of the fragment ions can produce a focus effect, so that the fragment ions reach the detector to form one