The efficiency of the polarisation mechanisms of laser cooling of atoms is analysed using narrow optical transitions for which the recoil energy is greater than or comparable to the natural line width. By the example of atoms with the J g = 1 → J e = 2 optical transition (J g and J e are the total angular momenta of the ground and excited states) in the resonant light fields of σ + – σ - and lin⊥lin configurations, the analysis of the minimum achievable energies of laser-cooled atoms is performed. It is shown that the polarisation mechanisms of laser cooling under conditions of a significant influence of recoil effects become less efficient and do not lead to average kinetic energies of an ensemble of atoms below the Doppler limit.

中文翻译：

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在极化梯度场中以窄光学跃迁对原子进行激光冷却

使用窄的光学跃迁分析原子的激光冷却原子的偏振机制的效率，对于这些跃迁，其反冲能量大于或等于自然线宽。以J g = 1→J e = 2的原子为例，在σ+ –σ-和lin⊥的共振光场中发生光学跃迁（J g和J e是基态和激发态的总角矩）在配置中，对激光冷却原子的最小可实现能量进行分析。结果表明，在反冲效果显着影响的条件下，激光冷却的偏振机制效率较低，并且不会导致原子集合的平均动能低于多普勒极限。