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arXiv 1706.04403physics.atom-phphysics.optics
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通过研究原子蒸气的吸收剖面求原子蒸气的数密度

Finding the number density of atomic vapor by studying its absorption profile

Harish Ravi, Mangesh Bhattarai, Vasant Natarajan

摘要:

我们展示了一种获得原子蒸气密度的技术,通过做一个适合的共振吸收光谱的密度矩阵模型。为了证明该技术的实用性,我们将其应用于吸收在${\rm D_2}$线的铯蒸气电池在室温下。由于开放跃迁的作用,光谱的线形是不对称的。这种不对称性在模型中解释使用渡越时间弛豫的原子穿越激光束。我们还通过研究数密度作为接近室温的温度的函数来获得蒸发的潜热。

英文摘要:

We demonstrate a technique for obtaining the density of atomic vapor, by doing a fit of the resonant absorption spectrum to a density-matrix model. In order to demonstrate the usefulness of the technique, we apply it to absorption in the ${\rm D_2}$ line of a Cs vapor cell at room temperature. The lineshape of the spectrum is asymmetric due to the role of open transitions. This asymmetry is explained in the model using transit-time relaxation as the atoms traverse the laser beam. We also obtain the latent heat of evaporation by studying the number density as a function of temperature close to room temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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