Interpretation of ortho–para hydrogen conversion

The interpretation of statistics of the nuclear spin states in the ortho–para hydrogen conversion by hydrogen atoms is considered. It is shown that the observable rate coefficient (which is the sum of the forward and reverse rate coefficients for ortho→para conversion) equals the distinguishable‐atom rate coefficient in the classical limit. In addition to spin‐1/2 nuclei, we also consider spin‐1 nuclei and spin‐0 nuclei.

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