AI Article Synopsis
- We measured electron spin resonance line shifts in compressed atomic hydrogen gas under a strong magnetic field.
- The shift was found to be negligible in a doubly polarized gas, unlike in a mixture of hyperfine states.
- Our findings presented the first direct measurement of the difference between triplet and singlet s-wave scattering lengths, aligning with theoretical predictions.
Article Abstract
We have measured electron spin resonance line shifts due to collisions in atomic hydrogen gas compressed to densities approximately 10(18) cm(-3) in a strong magnetic field (4.6 T). The shift in a doubly polarized gas is negligible, in contrast with a mixture of two hyperfine states. This difference is explained by properly including effects of quantum statistics in atomic collisions and magnetic dipolar effects. We report on the first direct measurement of the difference between the triplet and singlet s-wave scattering lengths a(t) - a(s) = 60(10) pm, which is in agreement with existing theories.
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| http://dx.doi.org/10.1103/PhysRevLett.101.263003 | DOI Listing |
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