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

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

2000-09-26

arxiv.org/abs/physics/0009078v2

Phys. Rev. A 63, 052717 (2001)

Physics

Atomic Physics

text+1 figure

Scientific paper

10.1103/PhysRevA.63.052717

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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