Abstract
We report experimental observations of the local orientational ordering of ortho-H2 molecules in dilute solid ortho-para mixtures for low temperatures. The results indicate a smooth, continuous freezing of the rotational degrees of freedom without any evidence for a distinct discontinuity in the temperature dependence of the local order parameters for the 37–600 mK temperature range.
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Edwards, C.M., Zhou, D., Lin, Y. et al. Local ordering in dilute ortho-para-hydrogen mixtures at low temperatures. J Low Temp Phys 72, 1–24 (1988). https://doi.org/10.1007/BF00681725
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DOI: https://doi.org/10.1007/BF00681725