We report on a theoretical model of the effect of coherent population trapping in alkali atoms in an optically thin gas cell with a buffer gas at a nonzero temperature in a pulsed laser field. The shape of the Ramsey resonance is analysed for two different temperature ranges, i. e. for a ‘cold’ atomic ensemble and for an ensemble of ‘hot’ atoms in a cell with a buffer gas. The influence of the hyperfine structure of the excited level on the shift of the central Ramsey resonance is investigated.

中文翻译：

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碰撞对 Ramsey 方法检测到的相干种群捕获共振形状的影响

我们报告了在脉冲激光场中在非零温度下具有缓冲气体的光学薄气室中碱原子中相干种群捕获效应的理论模型。Ramsey 共振的形状针对两个不同的温度范围进行了分析，即“冷”原子集合和具有缓冲气体的单元中的“热”原子集合。研究了激发能级的超精细结构对中心Ramsey共振位移的影响。