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超轻元素的电子探针定量分析的困难之一是:许多元素对超轻元素的K_α射线的质量吸收系数μ/ρ数据不可靠,不同工作者给出的数据可相差几倍。详见评述性文献(1)。Kohlhaas和Scheiding测定了一系列含O、N、C、B的已知成分的化合物中O—K_α,N—K_α,C—K_α,B—K_α射线的强度,用ZAF修正计算法计算出了许多元素对这些软x射线的质量吸收系数ι/ρ。由于他们采用的ZAF修正公式不适用于轻元素,致使他们的μ/ρ值误差极大。Love等提出了一套既适用于重元素又适用于轻元素的ZAF修正计算公式。本工作用Love等的修正计算公式重新处理了Kohlhaas和Scheiding的强度数据。得出的各元素对O—K_α,N—K_α,C—K_α和B—K_α射线的μ/ρ值。与他们的值不同,但却与Henke等用透射衰减法直接测定的对软x射线的μ/ρ值符合很好,也与Ruste和Gantois等用另一种适用于超轻元素的ZAF修正计算法测出的μ/ρ值基本一致。
One of the difficulties in the quantitative analysis of the electron probe of ultra-light elements is that the mass absorption coefficient μ / ρ of many elements on the K_α ray of ultra-light elements is not reliable, and the data given by different workers can be several times different. See the review of literature (1). Kohlhaas and Scheiding determined the intensities of O-Kα, N-Kα, C-Kα and B-Kα radiation in a series of compounds of known composition containing O, N, C, B and many calculated using the ZAF correction calculation Element of these soft x-ray mass absorption coefficient ι / ρ. Because of their use of ZAF correction formula does not apply to light elements, resulting in their μ / ρ value error is extremely large. Love et al. Proposed a ZAF correction formula that applies to both heavy and light elements. In this work, Kohlhaas and Scheiding’s intensity data are reprocessed using the revised calculation formula of Love et al. Μ / ρ values of the O-K_α, N-K_α, C-K_α and B-K_α rays obtained from each element. Unlike their values, they are in good agreement with the μ / ρ values for soft x-rays measured directly by Henke et al. Using the transmission-attenuated method and also with the ZAF correction calculated by Ruste and Gantois et al. For super-light elements Law measured μ / ρ values are basically the same.