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arXiv physics/0009078physics.atom-ph
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碱金属原子自旋交换碰撞中的自旋轴弛豫

Spin-axis relaxation in spin-exchange collisions of alkali atoms

S. Kadlecek, T. Walker, D. K. Walter, C. Erickson, W. Happer

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发表信息：
Phys. Rev. A 63, 052717 (2001)
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摘要：

本文计算了碱金属原子在二元碰撞中由于自旋轴相互作用而产生的自旋弛豫速率。我们表明，在这里的高温条件下的利益，与经典路径轨迹计算的自旋弛豫率是几乎相同的扭曲波玻恩近似计算。我们比较这些计算最近的实验，使用磁去耦隔离自旋弛豫由于二进制碰撞，由于三重范德华分子的形成。由二元碰撞率测量得到的自旋轴耦合系数与由分子退耦实验得到的自旋轴耦合系数一致。所有的实验数据是一致的一个简单的和物理上合理的自旋轴耦合系数的标度律。

英文摘要：

We present calculations of spin-relaxation rates of alkali-metal atoms due to the spin-axis interaction acting in binary collisions between the atoms. We show that for the high-temperature conditions of interest here, the spin relaxation rates calculated with classical-path trajectories are nearly the same as those calculated with the distorted-wave Born approximation. We compare these calculations to recent experiments that used magnetic decoupling to isolate spin relaxation due to binary collisions from that due to the formation of triplet van-der-Waals molecules. The values of the spin-axis coupling coefficients deduced from measurements of binary collision rates are consistent with those deduced from molecular decoupling experiments. All the experimental data is consistent with a simple and physically plausible scaling law for the spin-axis coupling coefficients.

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