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论述了隧道电离和阈上电离加热过程。并把此二过程加到一个nonLTE平均原子模型,用此模型来研究强场下光致电离类锂氖复合机制X射线激光。计算结果表明,当驱动激光脉冲为100fs、波长为0248μm、功率密度为2×1017Wcm2,氖气的密度为103gcm-3时,类锂氖精细结构跃迁3d5/2→2p3/2(λ=98)的最大增益系数约为100cm-1,其维持时间约为15ps。
The tunnel ionization and the process of the upper threshold ionization heating are discussed. The two processes are added to a non-LTE average atomic model, and the model is used to study the X-ray laser of photoionization lithium-neon complex mechanism under strong field. The calculated results show that the fine structure transition of lithium-like compounds is 3d5 / 2 → 2p3 / 2 when the laser pulse is 100fs, the wavelength is 0248μm, the power density is 2 × 1017Wcm2 and the density of neon gas is 103gcm-3. 2 (λ = 98) has a maximum gain coefficient of about 100cm-1 and a hold time of about 15ps.