激光线宽和光强对同位素原子选择光电离的影响
Influences of laser bandwidth and intensity on laser ionization of isotope atoms
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摘要: 本文研究了非单色(有限带宽)激光场与同位素原子体系相互作用的激发光电离过程.采用混沌场随机模型描述激光场,用密度矩阵理论和Fokker-Planck方程方法首次给出了非单色激光场与多能级原子相互作用的激发动力学方程.针对三能级同位素原子体系,讨论了激光线宽和激光光强对同位素原子电离概率和激光同位素分离过程中分离选择性的影响.Abstract: The ionization process of the interaction of nonmonochromatic laser with isotope atom system is studied. The multimode laser field is described by a stochastic model of chaotic field. By using the Fokker-Planck equation, the excited dynamic equation ofinteraction of the finite-bandwidth chaotic fields with K-level atom is derived. The influences of laser bandwidth and intensity on ionization efficiency and selectivity of three-level isotope atoms are also discussed.
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