这个词是什么意思？
The study of the energy of electrons ejected from matter by the photoelectric effect, i.e., as a direct result of absorption of energy from electromagnetic radiation. As the energies of the electrons are characteristic of a specific element, the measurement of the energy of these electrons is a technique used to determine the chemical composition of surfaces.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D056951 · MeSH 2026。
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