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用单电子模型研究了相对论效应，特别是相对论坐标变换所引起的高次谐波，得到了谐波产生和激光强度的关系，还得到了谱分布和观测角的关系，特别给出了谱线强度分布的周期和观测角的关系。这一效应可以定性解释相对论强激光和固体靶相互作用所产生的高次谐波
The single-electron model is used to study the relativistic effects, especially the higher harmonics caused by the relativistic coordinate transformation. The relationship between harmonic generation and laser intensity is obtained. The relationship between spectral distribution and observation angle is also obtained. Relationship between the period of intensity distribution and observation angle. This effect can be qualitatively explained by the relativistic high laser and solid target interaction generated by the higher harmonic